Frost Dates and Planting Windows in California
The 32°F frost dates at the 332 weather stations in California with NOAA's 1991–2020 Climate Normals, and the planting windows they give. These are long-term statistics, not a forecast. For the dates at the station nearest you, enter your ZIP code.
Frost dates across California
Each risk level uses a date with a set chance of frost. In spring, it's the chance of a 32°F frost on or after the last-frost date. In fall, it's the chance of the first 32°F frost on or before the first-frost date. At the Typical level (30%), the last frost ranges from January 3 to June 21 across the state, and the first frost from September 3 to January 8.
At 199 of these 332 stations, 32°F isn't reached every year. Their frost dates describe only the years when it is reached, and the ranges on this page include them.
| Risk level | Earliest last frost | Latest last frost | Earliest first frost | Latest first frost |
|---|---|---|---|---|
| Conservative (10%) | January 13SAN FRANCISCO INTL AP, CA US | July 3JESS VALLEY, CA US | August 222 stations | December 26EAGLE MTN, CA US |
| Typical (30%) | January 3SAN FRANCISCO INTL AP, CA US | June 21JESS VALLEY, CA US | September 3PORTOLA, CA US | January 8HEARST CASTLE, CA US |
| Aggressive (50%) | December 292 stations | June 14JESS VALLEY, CA US | September 10PORTOLA, CA US | February 1HEARST CASTLE, CA US |
Growing season length
The growing season is the stretch between the last spring frost and the first fall frost at 32°F. NOAA gives it as a length with a chance of being at least that long. Each risk level uses the length with that chance of a shorter season, so Conservative shows the shortest lengths.
| Risk level | Shortest | Longest |
|---|---|---|
| Conservative (90% chance of at least this long) | 62 daysPORTOLA, CA US | 365 daysPALM SPRINGS RGNL AP, CA US |
| Typical (70% chance of at least this long) | 79 daysPORTOLA, CA US | 365 days28 stations |
| Aggressive (50% chance of at least this long) | 91 daysPORTOLA, CA US | 365 days41 stations |
| Growing season | Stations |
|---|---|
| 60–79 days | 1 |
| 80–99 days | 11 |
| 100–119 days | 10 |
| 120–139 days | 12 |
| 140–159 days | 13 |
| 160–179 days | 18 |
| 180–199 days | 16 |
| 200–219 days | 17 |
| 220–239 days | 24 |
| 240–259 days | 34 |
| 260–279 days | 41 |
| 280–299 days | 26 |
| 300–319 days | 32 |
| 320–339 days | 24 |
| 340–359 days | 22 |
| 360–379 days | 31 |
Planting windows across California
For each crop, the earliest start and the latest end of its Typical windows among the stations. A window at any one station is shorter and falls inside this span. Transplant dates are for seedlings. A fall window is left out at stations where it would start on or before the last day of the spring window, so some rows cover fewer stations.
| Crop and task | Earliest start | Latest end | Stations |
|---|---|---|---|
| Basil: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Bean: Sow outdoors | January 3 | June 21 | 332 of 332 |
| Beet: Sow outdoors | December 6 | June 21 | 332 of 332 |
| Beet: Sow for fall | June 14 | November 19 | 329 of 332 |
| Broccoli: Transplant outdoors | December 6 | June 7 | 332 of 332 |
| Broccoli: Transplant for fall | June 4 | November 19 | 330 of 332 |
| Brussels sprouts: Transplant outdoors | December 6 | June 7 | 332 of 332 |
| Brussels sprouts: Transplant for fall | May 25 | November 29 | 318 of 332 |
| Cabbage: Transplant outdoors | December 6 | June 7 | 332 of 332 |
| Cabbage: Transplant for fall | May 30 | November 19 | 328 of 332 |
| Cantaloupe: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Cantaloupe: Sow outdoors | January 17 | July 5 | 332 of 332 |
| Carrot: Sow outdoors | December 6 | June 21 | 332 of 332 |
| Carrot: Sow for fall | June 12 | November 9 | 321 of 332 |
| Cucumber: Transplant outdoors | January 10 | June 28 | 332 of 332 |
| Cucumber: Sow outdoors | January 3 | June 21 | 332 of 332 |
| Eggplant: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Garlic: Plant for fall | September 3 | January 22 | 332 of 332 |
| Lettuce: Transplant outdoors | December 6 | June 7 | 332 of 332 |
| Lettuce: Sow outdoors | December 6 | June 7 | 332 of 332 |
| Lettuce: Sow for fall | June 4 | November 29 | 330 of 332 |
| Onion: Transplant or plant sets | December 6 | June 7 | 332 of 332 |
| Peas: Sow outdoors | December 6 | June 7 | 332 of 332 |
| Peas: Sow for fall | June 9 | November 19 | 332 of 332 |
| Pepper: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Potato: Plant seed potatoes | December 6 | June 21 | 332 of 332 |
| Pumpkin: Sow outdoors | January 17 | July 5 | 332 of 332 |
| Radish: Sow outdoors | December 6 | June 7 | 332 of 332 |
| Radish: Sow for fall | July 16 | December 19 | 332 of 332 |
| Spinach: Transplant outdoors | December 6 | June 7 | 332 of 332 |
| Spinach: Sow outdoors | December 6 | June 7 | 332 of 332 |
| Spinach: Sow for fall | June 21 | December 2 | 332 of 332 |
| Summer squash: Transplant outdoors | January 10 | June 28 | 332 of 332 |
| Summer squash: Sow outdoors | January 3 | June 21 | 332 of 332 |
| Sweet corn: Sow outdoors | January 3 | June 21 | 332 of 332 |
| Sweet potato: Plant slips | January 10 | July 5 | 332 of 332 |
| Tomato: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Turnip: Sow outdoors | December 6 | June 7 | 332 of 332 |
| Turnip: Sow for fall | June 21 | November 29 | 332 of 332 |
| Watermelon: Transplant outdoors | January 17 | July 5 | 332 of 332 |
| Watermelon: Sow outdoors | January 17 | July 5 | 332 of 332 |
Weather stations in California
Every station in California with NOAA frost-date normals, with its Typical 32°F frost dates and growing season. 41 of them have no 32°F frost dates.
| Station | Elevation | Last frost | First frost | Growing season |
|---|---|---|---|---|
| ADIN RS, CA US | 4,190 ft | June 4 | September 22 | 114 days |
| ALPINE, CA US32°F is reached in 90.1% of years here. Its frost dates describe only those years. | 1,690 ft | February 26 | December 14 | 300 days |
| ALTURAS MUNI AP, CA US | 4,380 ft | June 12 | September 6 | 87 days |
| ALTURAS, CA US | 4,380 ft | June 12 | September 6 | 86 days |
| ANAHEIM, CA US | 230 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| ANGWIN PACIFIC UNION COLLEGE, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 1,710 ft | April 18 | November 27 | 229 days |
| ANTIOCH PUMPING PLT #3, CA US32°F is reached in 81.3% of years here. Its frost dates describe only those years. | 60 ft | January 22 | December 10 | 333 days |
| ARCATA EUREKA AP, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 200 ft | March 28 | November 15 | 242 days |
| ASH MTN, CA US32°F is reached in 99.6% of years here. Its frost dates describe only those years. | 1,710 ft | March 31 | December 1 | 254 days |
| AUBERRY 2 NW, CA US | 2,090 ft | April 7 | November 25 | 236 days |
| AUBURN, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 1,290 ft | March 14 | November 28 | 265 days |
| AVALON CATALINA AP, CA US | 1,600 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| BAKER, CA US | 960 ft | February 22 | November 22 | 276 days |
| BAKERSFIELD 5 NW, CA US32°F is reached in 97.7% of years here. Its frost dates describe only those years. | 470 ft | February 12 | December 1 | 298 days |
| BAKERSFIELD AP, CA US32°F is reached in 89.5% of years here. Its frost dates describe only those years. | 490 ft | January 31 | December 7 | 322 days |
| BALCH PWR HOUSE, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 1,730 ft | March 8 | December 5 | 274 days |
| BARSTOW DAGGETT AP, CA US | 1,920 ft | February 28 | November 20 | 269 days |
| BARSTOW, CA US | 2,220 ft | March 3 | November 17 | 258 days |
| BEN LOMOND #4, CA US | 420 ft | April 4 | November 1 | 216 days |
| BERKELEY, CA US32°F is reached in 26.6% of years here. Its frost dates describe only those years. | 310 ft | January 12 | December 25 | 365 days |
| BIG BAR 4 E, CA US | 1,250 ft | April 24 | October 23 | 185 days |
| BIG BEAR LAKE, CA US | 6,750 ft | June 2 | September 29 | 121 days |
| BIG SUR STN, CA US32°F is reached in 82.8% of years here. Its frost dates describe only those years. | 200 ft | March 7 | December 11 | 296 days |
| BISHOP AP, CA US | 4,100 ft | May 7 | October 9 | 154 days |
| BLUE CANYON AP, CA US | 5,280 ft | May 15 | October 26 | 168 days |
| BLYTHE AP, CA US32°F is reached in 79.5% of years here. Its frost dates describe only those years. | 400 ft | January 26 | December 13 | 334 days |
| BLYTHE, CA US32°F is reached in 95.9% of years here. Its frost dates describe only those years. | 270 ft | February 8 | December 5 | 308 days |
| BOCA, CA US | 5,580 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| BODEGA 6 WSW, CA US32°F is reached in 17.9% of years here. Its frost dates describe only those years. | 60 ft | February 3 | December 20 | 365 days |
| BODIE CALIFORNIA ST HISTORIC P, CA US | 8,370 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| BORREGO DESERT PARK, CA US32°F is reached in 44.6% of years here. Its frost dates describe only those years. | 810 ft | January 27 | December 23 | 356 days |
| BOWMAN DAM, CA US | 5,380 ft | May 23 | October 20 | 156 days |
| BRAWLEY 2 SW, CA US32°F is reached in 91.3% of years here. Its frost dates describe only those years. | -100 ft | February 1 | December 11 | 323 days |
| BRIDGEPORT, CA US | 6,470 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| BURBANK GLENDALE PASADENA AP, CA US32°F is reached in 20.7% of years here. Its frost dates describe only those years. | 740 ft | January 5 | December 21 | 365 days |
| BURBANK VALLEY PUMP PLT, CA US32°F is reached in 54.8% of years here. Its frost dates describe only those years. | 650 ft | January 10 | December 16 | 350 days |
| BURNEY, CA US | 3,200 ft | June 10 | September 9 | 93 days |
| BUTTONWILLOW, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 230 ft | February 22 | November 20 | 276 days |
| CACHUMA LAKE, CA US | 790 ft | April 20 | November 1 | 195 days |
| CALAVERAS BIG TREES, CA US | 4,690 ft | May 18 | October 18 | 157 days |
| CALISTOGA, CA US32°F is reached in 99.7% of years here. Its frost dates describe only those years. | 400 ft | March 25 | November 13 | 242 days |
| CALLAHAN, CA US | 3,080 ft | May 31 | September 29 | 125 days |
| CAMARILLO AP, CA US32°F is reached in 28.9% of years here. Its frost dates describe only those years. | 80 ft | January 11 | December 17 | 365 days |
| CAMP PARDEE, CA US32°F is reached in 87.8% of years here. Its frost dates describe only those years. | 660 ft | February 8 | December 9 | 313 days |
| CAMP PENDLETON MCAS, CA US32°F is reached in 98.2% of years here. Its frost dates describe only those years. | 80 ft | February 28 | December 1 | 281 days |
| CAMPO ASOS, CA US | 2,640 ft | May 13 | October 21 | 170 days |
| CAMPO, CA US | 2,630 ft | May 13 | October 15 | 157 days |
| CANBY 3 SW, CA US | 4,310 ft | June 9 | September 10 | 97 days |
| CANYON DAM, CA US | 4,560 ft | May 29 | October 3 | 131 days |
| CARLSBAD PALOMAR AP, CA US | 330 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| CARMEL VALLEY, CA US32°F is reached in 97.6% of years here. Its frost dates describe only those years. | 480 ft | March 5 | November 29 | 276 days |
| CECILVILLE, CA US | 2,310 ft | May 4 | October 14 | 166 days |
| CEDARVILLE, CA US | 4,690 ft | May 26 | September 26 | 125 days |
| CHERRY VALLEY DAM, CA US | 4,770 ft | May 13 | October 28 | 170 days |
| CHESTER, CA US | 4,530 ft | June 4 | September 21 | 113 days |
| CHICO UNIV FARM, CA US | 190 ft | March 15 | November 10 | 242 days |
| CHINA LAKE NAF, CA US | 2,230 ft | March 24 | November 6 | 231 days |
| CHINO AP, CA US32°F is reached in 85.4% of years here. Its frost dates describe only those years. | 650 ft | February 3 | December 10 | 319 days |
| CHIRIACO SUMMIT, CA US32°F is reached in 97.3% of years here. Its frost dates describe only those years. | 1,710 ft | February 22 | December 8 | 297 days |
| CHULA VISTA, CA US | 60 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| CLEARLAKE 4 SE, CA US | 1,350 ft | April 18 | November 1 | 199 days |
| CLOVERDALE, CA US32°F is reached in 99.5% of years here. Its frost dates describe only those years. | 400 ft | March 10 | November 26 | 262 days |
| COALINGA, CA US32°F is reached in 99.4% of years here. Its frost dates describe only those years. | 670 ft | February 25 | November 24 | 279 days |
| COLFAX, CA US | 2,380 ft | April 13 | November 16 | 218 days |
| COLUSA 2 SSW, CA US32°F is reached in 98.3% of years here. Its frost dates describe only those years. | 50 ft | February 28 | November 23 | 271 days |
| CONCORD BUCHANAN FLD, CA US32°F is reached in 79.4% of years here. Its frost dates describe only those years. | 20 ft | January 23 | December 6 | 332 days |
| CONCORD WWTP, CA US32°F is reached in 79.9% of years here. Its frost dates describe only those years. | 40 ft | January 17 | December 11 | 334 days |
| COPCO #1 DAM, CA US | 2,700 ft | May 15 | October 16 | 155 days |
| CORCORAN IRRIG DIST, CA US | 200 ft | February 26 | November 21 | 272 days |
| COVELO, CA US | 1,410 ft | April 29 | October 11 | 169 days |
| CRESCENT CITY 3 NNW, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 40 ft | March 25 | November 14 | 239 days |
| CRESCENT CITY MCNAMARA AP, CA US32°F is reached in 75% of years here. Its frost dates describe only those years. | 60 ft | February 22 | December 10 | 312 days |
| CULVER CITY, CA US | 90 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| CUYAMACA, CA US | 4,640 ft | April 29 | October 19 | 178 days |
| DAVIS 2 WSW EXP FARM, CA US32°F is reached in 98.4% of years here. Its frost dates describe only those years. | 60 ft | February 25 | November 24 | 277 days |
| DE SABLA, CA US | 2,710 ft | April 26 | November 3 | 195 days |
| DEATH VALLEY NP, CA US32°F is reached in 80.9% of years here. Its frost dates describe only those years. | -190 ft | January 9 | December 12 | 342 days |
| DELANO, CA US32°F is reached in 98.2% of years here. Its frost dates describe only those years. | 300 ft | February 13 | December 1 | 293 days |
| DESERT RESORTS RGNL AP, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | -120 ft | February 17 | November 26 | 285 days |
| DOBBINS 1 S, CA US | 1,640 ft | April 9 | November 9 | 216 days |
| DONNER MEM SP, CA US | 5,940 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| DOWNIEVILLE, CA US | 2,920 ft | May 6 | October 19 | 168 days |
| DOYLE 4 SSE, CA US | 4,390 ft | May 31 | September 24 | 119 days |
| DUNSMUIR TRTMT PL, CA US | 2,170 ft | May 1 | October 20 | 174 days |
| EAGLE MTN, CA US32°F is reached in 13.1% of years here. Its frost dates describe only those years. | 970 ft | January 16 | January 4 | 365 days |
| EAST PARK RSVR, CA US | 1,210 ft | April 14 | November 4 | 209 days |
| EL CAJON, CA US32°F is reached in 72.8% of years here. Its frost dates describe only those years. | 500 ft | January 21 | December 12 | 338 days |
| EL CAPITAN DAM, CA US32°F is reached in 96.7% of years here. Its frost dates describe only those years. | 600 ft | April 14 | November 28 | 233 days |
| EL CENTRO 2 SSW, CA US32°F is reached in 53.5% of years here. Its frost dates describe only those years. | -30 ft | January 15 | December 21 | 351 days |
| EL CENTRO NAF, CA US32°F is reached in 78.9% of years here. Its frost dates describe only those years. | -40 ft | January 19 | December 13 | 334 days |
| EL MIRAGE, CA US | 2,950 ft | April 6 | November 5 | 220 days |
| ELSINORE, CA US32°F is reached in 91.1% of years here. Its frost dates describe only those years. | 1,270 ft | February 10 | December 10 | 310 days |
| ESCONDIDO #2, CA US32°F is reached in 38.6% of years here. Its frost dates describe only those years. | 600 ft | January 14 | December 23 | 360 days |
| EUREKA WFO WOODLEY ISLAND, CA US32°F is reached in 97.1% of years here. Its frost dates describe only those years. | 20 ft | March 4 | November 28 | 274 days |
| FAIRFIELD, CA US32°F is reached in 87.6% of years here. Its frost dates describe only those years. | 40 ft | January 28 | December 7 | 323 days |
| FAIRMONT, CA US | 3,060 ft | April 25 | November 19 | 214 days |
| FALLBROOK 5 NE, CA US32°F is reached in 17.1% of years here. Its frost dates describe only those years. | 1,140 ft | February 14 | January 3 | 365 days |
| FIVE POINTS 5 SSW, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 290 ft | March 18 | November 19 | 250 days |
| FREMONT, CA US32°F is reached in 64.6% of years here. Its frost dates describe only those years. | 40 ft | January 22 | December 12 | 339 days |
| FRESNO 5 NE, CA US32°F is reached in 97.5% of years here. Its frost dates describe only those years. | 340 ft | February 10 | December 4 | 303 days |
| FRESNO YOSEMITE INTL AP, CA US32°F is reached in 85.4% of years here. Its frost dates describe only those years. | 330 ft | January 29 | December 6 | 324 days |
| FRIANT GOVERNMENT CAMP, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 410 ft | March 31 | November 23 | 244 days |
| FT BIDWELL, CA US | 4,740 ft | June 4 | September 23 | 115 days |
| FT BRAGG 5 N, CA US32°F is reached in 97.7% of years here. Its frost dates describe only those years. | 120 ft | March 18 | November 22 | 255 days |
| FT ROSS, CA US32°F is reached in 86.7% of years here. Its frost dates describe only those years. | 110 ft | March 25 | December 15 | 281 days |
| FULLERTON MUNI AP, CA US | 100 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| GEORGETOWN RS, CA US | 3,000 ft | April 20 | November 12 | 207 days |
| GETTY CTR, CA US | 1,120 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| GIBRALTAR DAM #2, CA US | 1,560 ft | April 4 | November 19 | 236 days |
| GILROY, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 190 ft | March 8 | November 20 | 259 days |
| GLENNVILLE, CA US | 3,140 ft | May 23 | October 10 | 143 days |
| GRANT GROVE, CA US | 6,580 ft | June 5 | September 30 | 121 days |
| GRASS VALLEY #2, CA US | 2,400 ft | April 18 | November 5 | 205 days |
| GRATON, CA US | 200 ft | April 3 | November 5 | 222 days |
| GRIZZLY CREEK SP, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 410 ft | March 22 | November 13 | 247 days |
| GROVELAND 2, CA US | 2,800 ft | May 1 | October 26 | 179 days |
| HAIWEE, CA US | 3,830 ft | April 25 | October 24 | 186 days |
| HALF MOON BAY, CA US32°F is reached in 81.9% of years here. Its frost dates describe only those years. | 30 ft | February 26 | December 6 | 302 days |
| HANFORD 1 S, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 240 ft | February 17 | November 25 | 282 days |
| HANFORD MUNI AP, CA US | 250 ft | March 1 | November 16 | 261 days |
| HAT CREEK, CA US | 3,020 ft | June 6 | September 14 | 101 days |
| HAWTHORNE MUNI AP, CA US | 60 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| HAYFIELD PUMPING PLT, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 1,370 ft | March 2 | November 22 | 269 days |
| HAYWARD AIR TERMINAL, CA US32°F is reached in 45.2% of years here. Its frost dates describe only those years. | 40 ft | January 12 | December 17 | 355 days |
| HEALDSBURG, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 180 ft | February 28 | November 26 | 274 days |
| HEARST CASTLE, CA US32°F is reached in 40% of years here. Its frost dates describe only those years. | 1,530 ft | February 27 | January 8 | 353 days |
| HEMET, CA US32°F is reached in 67% of years here. Its frost dates describe only those years. | 1,810 ft | January 31 | December 11 | 333 days |
| HENSHAW DAM, CA US | 2,700 ft | April 28 | October 18 | 176 days |
| HESPERIA 2E, CA US | 3,060 ft | March 12 | November 23 | 255 days |
| HETCH HETCHY, CA US | 3,870 ft | April 25 | November 4 | 196 days |
| HOLLISTER 2, CA US32°F is reached in 99.5% of years here. Its frost dates describe only those years. | 270 ft | March 2 | November 23 | 271 days |
| HUNTINGTON LAKE, CA US | 7,020 ft | June 7 | September 29 | 119 days |
| IDYLLWILD FIRE DEPT, CA US | 5,380 ft | May 27 | October 14 | 147 days |
| IMPERIAL BEACH REAM FLD NAS, CA US | 20 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| IMPERIAL CO AP, CA US32°F is reached in 79.7% of years here. Its frost dates describe only those years. | -60 ft | January 28 | December 14 | 333 days |
| IMPERIAL, CA US32°F is reached in 60.6% of years here. Its frost dates describe only those years. | -60 ft | January 16 | December 18 | 349 days |
| INDEPENDENCE, CA US | 3,950 ft | April 10 | November 4 | 212 days |
| INDIO FIRE STN, CA US32°F is reached in 29.8% of years here. Its frost dates describe only those years. | -20 ft | January 5 | December 17 | 365 days |
| INYOKERN, CA US | 2,430 ft | March 24 | November 13 | 237 days |
| IRON MTN, CA US32°F is reached in 30.7% of years here. Its frost dates describe only those years. | 920 ft | January 13 | December 20 | 365 days |
| IRVINE RCH, CA US | 540 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| JESS VALLEY, CA US | 5,400 ft | June 21 | September 10 | 84 days |
| JOHNSON VALLEY, CA US | 3,170 ft | March 13 | November 23 | 256 days |
| JOSHUA TREE, CA US | 2,560 ft | March 11 | November 24 | 259 days |
| JULIAN CDF, CA US | 4,210 ft | April 11 | November 20 | 230 days |
| KENTFIELD, CA US32°F is reached in 85.9% of years here. Its frost dates describe only those years. | 150 ft | February 5 | December 8 | 317 days |
| KERN RIVER PH 3, CA US | 2,700 ft | April 14 | November 5 | 209 days |
| KETTLEMAN CITY, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 240 ft | March 2 | November 23 | 268 days |
| KING CITY, CA US | 320 ft | March 6 | November 13 | 256 days |
| KLAMATH, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 30 ft | March 30 | November 9 | 233 days |
| LAGUNA BEACH, CA US32°F is reached in 20.1% of years here. Its frost dates describe only those years. | 40 ft | January 21 | December 28 | 365 days |
| LAKE ARROWHEAD, CA US | 5,210 ft | May 18 | October 25 | 164 days |
| LAKE SOLANO, CA US32°F is reached in 96.9% of years here. Its frost dates describe only those years. | 190 ft | February 19 | November 29 | 290 days |
| LAKE SPAULDING, CA US | 5,160 ft | May 30 | October 7 | 135 days |
| LANCASTER WM J FOX FLD, CA US | 2,340 ft | April 11 | October 27 | 200 days |
| LAVA BEDS NAT MON, CA US | 4,770 ft | June 13 | September 20 | 103 days |
| LEE VINING, CA US | 6,800 ft | May 31 | October 4 | 129 days |
| LEMON COVE, CA US32°F is reached in 97.6% of years here. Its frost dates describe only those years. | 510 ft | February 23 | December 1 | 289 days |
| LEMOORE REEVES NAS, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 230 ft | March 8 | November 13 | 250 days |
| LINDSAY, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 440 ft | March 2 | November 24 | 268 days |
| LIVERMORE MUNI AP, CA US32°F is reached in 99.6% of years here. Its frost dates describe only those years. | 390 ft | March 10 | November 23 | 265 days |
| LIVERMORE, CA US32°F is reached in 99.3% of years here. Its frost dates describe only those years. | 390 ft | February 28 | November 25 | 276 days |
| LODGEPOLE, CA US | 6,730 ft | June 16 | September 12 | 89 days |
| LODI, CA US32°F is reached in 98.1% of years here. Its frost dates describe only those years. | 40 ft | February 22 | November 29 | 286 days |
| LOMPOC, CA US32°F is reached in 81.4% of years here. Its frost dates describe only those years. | 80 ft | February 3 | December 10 | 319 days |
| LONG BEACH DAUGHERTY FLD, CA US | 30 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| LORAINE 5 NNE, CA US | 4,230 ft | April 30 | November 5 | 190 days |
| LOS ANGELES DWTN USC CAMPUS, CA US | 230 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| LOS ANGELES INTL AP, CA US | 100 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| LOS BANOS DET RESV, CA US32°F is reached in 89.8% of years here. Its frost dates describe only those years. | 410 ft | January 26 | December 8 | 327 days |
| LOS BANOS, CA US32°F is reached in 95.6% of years here. Its frost dates describe only those years. | 120 ft | February 4 | December 5 | 308 days |
| LOS GATOS, CA US32°F is reached in 96.7% of years here. Its frost dates describe only those years. | 370 ft | February 17 | November 28 | 291 days |
| MADERA MUNI AP, CA US32°F is reached in 98.6% of years here. Its frost dates describe only those years. | 250 ft | February 27 | November 24 | 276 days |
| MADERA, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 270 ft | February 28 | November 20 | 267 days |
| MAMMOTH LAKES RS, CA US | 7,800 ft | June 17 | September 10 | 89 days |
| MANZANITA LAKE, CA US | 5,750 ft | June 16 | September 11 | 91 days |
| MARKLEY COVE, CA US32°F is reached in 99.7% of years here. Its frost dates describe only those years. | 480 ft | March 21 | November 23 | 250 days |
| MARTINEZ WTP, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 40 ft | March 11 | November 15 | 251 days |
| MARYSVILLE YUBA CO AP, CA US32°F is reached in 99.7% of years here. Its frost dates describe only those years. | 60 ft | February 26 | November 22 | 272 days |
| MARYSVILLE, CA US32°F is reached in 88.7% of years here. Its frost dates describe only those years. | 60 ft | January 30 | December 4 | 318 days |
| MCCLOUD, CA US | 3,230 ft | June 4 | September 24 | 114 days |
| MECCA FIRE STN, CA US32°F is reached in 69.6% of years here. Its frost dates describe only those years. | -180 ft | January 18 | December 14 | 340 days |
| MERCED 23 WSW, CA US | 80 ft | April 10 | November 6 | 216 days |
| MERCED MUNI AP, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 150 ft | March 8 | November 19 | 260 days |
| MERCED, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 150 ft | March 19 | November 16 | 247 days |
| MINERAL, CA US | 4,880 ft | June 17 | September 4 | 86 days |
| MITCHELL CAVERNS, CA US32°F is reached in 99.4% of years here. Its frost dates describe only those years. | 4,350 ft | March 21 | November 28 | 252 days |
| MODESTO CITY CO AP, CA US32°F is reached in 97.1% of years here. Its frost dates describe only those years. | 70 ft | February 10 | November 29 | 298 days |
| MOFFETT FEDERAL AIRFIELD, CA US32°F is reached in 69.8% of years here. Its frost dates describe only those years. | 40 ft | January 18 | December 15 | 342 days |
| MOJAVE, CA US | 2,730 ft | March 29 | November 11 | 227 days |
| MONTAGUE SISKIYOU CO AP, CA US | 2,630 ft | May 21 | October 2 | 138 days |
| MONTEREY PENINSUL AP, CA US32°F is reached in 52.7% of years here. Its frost dates describe only those years. | 170 ft | January 10 | December 12 | 350 days |
| MONTEREY WFO, CA US32°F is reached in 46.9% of years here. Its frost dates describe only those years. | 120 ft | January 12 | December 17 | 355 days |
| MONTEREY, CA US32°F is reached in 19.9% of years here. Its frost dates describe only those years. | 260 ft | January 9 | December 21 | 365 days |
| MORONGO VALLEY N, CA US32°F is reached in 97.9% of years here. Its frost dates describe only those years. | 3,150 ft | March 11 | December 7 | 275 days |
| MORRO BAY FIRE DEPT, CA US32°F is reached in 14.9% of years here. Its frost dates describe only those years. | 120 ft | January 31 | January 2 | 365 days |
| MT DIABLO JUNCTION, CA US32°F is reached in 95.9% of years here. Its frost dates describe only those years. | 2,170 ft | March 28 | December 9 | 264 days |
| MT HAMILTON, CA US | 4,210 ft | May 16 | November 7 | 180 days |
| MT LAGUNA #3, CA US | 5,920 ft | May 4 | October 30 | 181 days |
| MT SHASTA, CA US | 3,610 ft | May 23 | September 30 | 132 days |
| MT SHASTA, CA US | 3,540 ft | May 15 | October 5 | 147 days |
| MT WILSON CBS, CA US | 5,710 ft | May 9 | November 5 | 186 days |
| N FK RS, CA US | 2,650 ft | May 1 | October 28 | 181 days |
| NAPA CO AP, CA US32°F is reached in 99.7% of years here. Its frost dates describe only those years. | 10 ft | March 25 | November 12 | 236 days |
| NAPA STATE HOSPITAL, CA US32°F is reached in 98.4% of years here. Its frost dates describe only those years. | 40 ft | February 27 | November 28 | 279 days |
| NEEDLES AP, CA US32°F is reached in 36.6% of years here. Its frost dates describe only those years. | 890 ft | January 16 | December 27 | 362 days |
| NEVADA CITY, CA US | 2,780 ft | April 23 | November 10 | 205 days |
| NEW CUYAMA FIRE STN, CA US | 2,160 ft | April 22 | October 29 | 189 days |
| NEW MELONES DAM HQ, CA US32°F is reached in 99.2% of years here. Its frost dates describe only those years. | 960 ft | March 7 | December 4 | 272 days |
| NEWARK, CA US32°F is reached in 43.2% of years here. Its frost dates describe only those years. | 10 ft | January 8 | December 19 | 358 days |
| NEWHALL 5NW, CA US32°F is reached in 37.2% of years here. Its frost dates describe only those years. | 1,770 ft | January 26 | December 20 | 363 days |
| NEWMAN, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 90 ft | March 26 | November 21 | 251 days |
| NEWPORT BEACH HARBOR, CA US | 10 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| NORTH ISLAND NAS, CA US | 30 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| NORTHRIDGE CAL STATE, CA US32°F is reached in 18.4% of years here. Its frost dates describe only those years. | 900 ft | January 10 | December 21 | 365 days |
| OAKLAND METRO INTL AP, CA US32°F is reached in 62.9% of years here. Its frost dates describe only those years. | 10 ft | January 22 | December 10 | 341 days |
| OAKLAND MUSEUM, CA US | 30 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| OCCIDENTAL, CA US32°F is reached in 66.6% of years here. Its frost dates describe only those years. | 870 ft | February 27 | December 16 | 320 days |
| OCEANSIDE MARINA, CA US | 10 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| OCEANSIDE MUNI AP, CA US32°F is reached in 90.8% of years here. Its frost dates describe only those years. | 30 ft | February 4 | December 1 | 309 days |
| OCOTILLO WELLS 2W, CA US32°F is reached in 16.7% of years here. Its frost dates describe only those years. | 390 ft | January 15 | December 25 | 365 days |
| OJAI, CA US | 750 ft | April 3 | November 7 | 223 days |
| ONTARIO INTL AP, CA US32°F is reached in 40.9% of years here. Its frost dates describe only those years. | 950 ft | January 13 | December 22 | 359 days |
| ORICK PRAIRIE CREEK PARK, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 160 ft | April 23 | October 28 | 194 days |
| ORLAND, CA US32°F is reached in 99.7% of years here. Its frost dates describe only those years. | 250 ft | March 12 | November 25 | 262 days |
| ORLEANS, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 400 ft | March 26 | November 13 | 244 days |
| OROVILLE MUNI AP, CA US32°F is reached in 94.5% of years here. Its frost dates describe only those years. | 190 ft | February 12 | November 30 | 302 days |
| OROVILLE, CA US32°F is reached in 94.4% of years here. Its frost dates describe only those years. | 170 ft | February 12 | December 4 | 304 days |
| OXNARD VENTURA CO AP, CA US | 40 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| OXNARD WFO, CA US | 50 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| OXNARD, CA US | 50 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| PACIFIC HOUSE, CA US | 3,450 ft | May 2 | October 24 | 178 days |
| PACIFICA 4 SSE, CA US32°F is reached in 20.1% of years here. Its frost dates describe only those years. | 480 ft | January 26 | January 1 | 365 days |
| PAICINES 4 W, CA US | 900 ft | April 25 | October 27 | 188 days |
| PALM SPRINGS RGNL AP, CA US32°F is reached in 10.9% of years here. Its frost dates describe only those years. | 420 ft | January 15 | January 2 | 365 days |
| PALM SPRINGS, CA US32°F is reached in 21.3% of years here. Its frost dates describe only those years. | 420 ft | January 7 | December 21 | 365 days |
| PALMDALE AP, CA US | 2,520 ft | March 29 | November 9 | 228 days |
| PALMDALE, CA US | 2,610 ft | March 27 | November 12 | 234 days |
| PALO ALTO, CA US32°F is reached in 95.8% of years here. Its frost dates describe only those years. | 20 ft | February 14 | December 1 | 293 days |
| PALOMAR MTN OBSY, CA US | 5,550 ft | May 10 | November 8 | 184 days |
| PARADISE, CA US32°F is reached in 92.1% of years here. Its frost dates describe only those years. | 1,750 ft | March 1 | December 8 | 290 days |
| PARKER RESRVOIR, CA US32°F is reached in 50.9% of years here. Its frost dates describe only those years. | 740 ft | January 18 | December 23 | 358 days |
| PASADENA, CA US32°F is reached in 12.9% of years here. Its frost dates describe only those years. | 860 ft | January 14 | January 1 | 365 days |
| PASO ROBLES MUNI AP, CA US | 810 ft | April 14 | October 29 | 201 days |
| PASO ROBLES, CA US | 730 ft | March 31 | November 1 | 224 days |
| PEARBLOSSOM, CA US | 3,100 ft | April 1 | November 24 | 242 days |
| PETALUMA AP, CA US32°F is reached in 99.5% of years here. Its frost dates describe only those years. | 20 ft | March 13 | November 18 | 256 days |
| PINNACLES NM, CA US | 1,310 ft | May 11 | October 26 | 170 days |
| PISMO BEACH, CA US32°F is reached in 53.7% of years here. Its frost dates describe only those years. | 40 ft | February 21 | December 26 | 334 days |
| PLACERVILLE, CA US | 1,850 ft | April 11 | November 14 | 223 days |
| POINT MUGU NF, CA US32°F is reached in 24.7% of years here. Its frost dates describe only those years. | 10 ft | January 4 | December 14 | 365 days |
| POMONA/FAIRPLEX, CA US32°F is reached in 65.1% of years here. Its frost dates describe only those years. | 1,000 ft | January 26 | December 19 | 339 days |
| PORTERVILLE, CA US32°F is reached in 90.8% of years here. Its frost dates describe only those years. | 390 ft | January 31 | December 5 | 314 days |
| PORTOLA, CA US | 4,850 ft | June 18 | September 3 | 79 days |
| POTTER VALLEY POWERHOUSE, CA US | 1,020 ft | April 17 | November 1 | 199 days |
| PRIEST VALLEY, CA US | 2,300 ft | May 17 | October 13 | 153 days |
| QUINCY, CA US | 3,420 ft | June 1 | September 16 | 111 days |
| RAMONA AP, CA US | 1,390 ft | March 30 | November 16 | 236 days |
| RAMONA FIRE DEPT, CA US | 1,470 ft | March 23 | November 30 | 253 days |
| RANCHO BERNARDO, CA US32°F is reached in 20.9% of years here. Its frost dates describe only those years. | 690 ft | January 15 | December 28 | 365 days |
| RANDSBURG, CA US | 3,570 ft | March 31 | November 16 | 238 days |
| RED BLUFF MUNI AP, CA US32°F is reached in 99.5% of years here. Its frost dates describe only those years. | 350 ft | March 5 | November 22 | 265 days |
| REDDING 12 WNW, CA US | 1,420 ft | March 30 | November 14 | 236 days |
| REDDING MUNI AP, CA US | 500 ft | March 17 | November 16 | 246 days |
| REDLANDS, CA US32°F is reached in 87.7% of years here. Its frost dates describe only those years. | 1,410 ft | February 10 | December 11 | 310 days |
| REDONDO BEACH, CA US | 140 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| REDWOOD CITY, CA US32°F is reached in 88.1% of years here. Its frost dates describe only those years. | 30 ft | January 31 | December 4 | 318 days |
| RICHARDSON GR SP, CA US32°F is reached in 98.1% of years here. Its frost dates describe only those years. | 500 ft | March 27 | November 21 | 251 days |
| RICHMOND, CA US32°F is reached in 22% of years here. Its frost dates describe only those years. | 20 ft | January 14 | December 27 | 365 days |
| RIVERSIDE CITRUS EXP, CA US32°F is reached in 45.3% of years here. Its frost dates describe only those years. | 990 ft | January 25 | December 26 | 357 days |
| RIVERSIDE FIRE STN 3, CA US32°F is reached in 68.8% of years here. Its frost dates describe only those years. | 840 ft | January 25 | December 15 | 338 days |
| RIVERSIDE MUNI AP, CA US32°F is reached in 57.5% of years here. Its frost dates describe only those years. | 810 ft | January 29 | December 19 | 346 days |
| S LAKE FS, CA US | 2,650 ft | April 12 | October 28 | 203 days |
| SACRAMENTO 5 ESE, CA US32°F is reached in 81.4% of years here. Its frost dates describe only those years. | 40 ft | January 22 | December 7 | 329 days |
| SACRAMENTO EXECUTIVE AP, CA US32°F is reached in 98.1% of years here. Its frost dates describe only those years. | 20 ft | February 17 | November 26 | 286 days |
| SACRAMENTO METRO AP, CA US32°F is reached in 99.4% of years here. Its frost dates describe only those years. | 20 ft | March 5 | November 17 | 260 days |
| SAGEHEN CREEK, CA US | 6,340 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| SAINT HELENA, CA US32°F is reached in 97.3% of years here. Its frost dates describe only those years. | 230 ft | February 22 | November 27 | 288 days |
| SALINAS #2, CA US32°F is reached in 95.9% of years here. Its frost dates describe only those years. | 40 ft | February 21 | November 30 | 292 days |
| SALINAS MUNICIPAL AP, CA US32°F is reached in 89.9% of years here. Its frost dates describe only those years. | 70 ft | February 12 | December 2 | 307 days |
| SAN DIEGO BROWN FLD, CA US32°F is reached in 25.1% of years here. Its frost dates describe only those years. | 520 ft | January 17 | December 22 | 365 days |
| SAN DIEGO LINDBERGH FLD, CA US | 20 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SAN DIEGO MIRAMAR NAS, CA US | 480 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SAN DIEGO MONTGOMERY FLD, CA US | 420 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SAN DIEGO SEAWORLD, CA US | 10 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SAN FRANCISCO DWTN, CA US | 150 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SAN FRANCISCO INTL AP, CA US32°F is reached in 11.6% of years here. Its frost dates describe only those years. | 10 ft | January 3 | December 21 | 365 days |
| SAN FRANCISCO OCEANSIDE, CA US32°F is reached in 21.7% of years here. Its frost dates describe only those years. | 10 ft | January 23 | December 12 | 365 days |
| SAN GABRIEL FIRE DEPT, CA US32°F is reached in 15.3% of years here. Its frost dates describe only those years. | 360 ft | January 13 | December 28 | 365 days |
| SAN GREGORIO 2 SE, CA US32°F is reached in 99.1% of years here. Its frost dates describe only those years. | 270 ft | March 26 | November 14 | 246 days |
| SAN JACINTO, CA US32°F is reached in 97.1% of years here. Its frost dates describe only those years. | 1,520 ft | February 14 | December 2 | 297 days |
| SAN JOSE, CA US32°F is reached in 56.2% of years here. Its frost dates describe only those years. | 70 ft | January 10 | December 14 | 350 days |
| SAN JOSE, CA US32°F is reached in 76% of years here. Its frost dates describe only those years. | 50 ft | January 26 | December 12 | 335 days |
| SAN LUIS DAM, CA US32°F is reached in 94.7% of years here. Its frost dates describe only those years. | 280 ft | February 5 | December 4 | 311 days |
| SAN LUIS OBISPO AP, CA US32°F is reached in 95% of years here. Its frost dates describe only those years. | 200 ft | February 17 | December 2 | 302 days |
| SAN LUIS OBISPO POLY, CA US32°F is reached in 68.1% of years here. Its frost dates describe only those years. | 310 ft | February 6 | December 13 | 329 days |
| SAN PASQUAL ANIMAL PK, CA US32°F is reached in 97.8% of years here. Its frost dates describe only those years. | 420 ft | February 17 | December 1 | 294 days |
| SAN RAFAEL CIVIC CTR, CA US32°F is reached in 69.8% of years here. Its frost dates describe only those years. | 120 ft | February 1 | December 13 | 334 days |
| SANDBERG, CA US | 4,510 ft | April 26 | November 15 | 209 days |
| SANTA ANA FIRE STN, CA US | 130 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SANTA ANA JOHN WAYNE AP, CA US | 50 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SANTA BARBARA 11 W, CA US32°F is reached in 46.3% of years here. Its frost dates describe only those years. | 20 ft | January 12 | December 11 | 352 days |
| SANTA BARBARA MUNI AP, CA US32°F is reached in 80.9% of years here. Its frost dates describe only those years. | 10 ft | January 28 | December 8 | 329 days |
| SANTA BARBARA, CA US32°F is reached in 11% of years here. Its frost dates describe only those years. | 20 ft | January 27 | December 29 | 365 days |
| SANTA CRUZ, CA US32°F is reached in 91.1% of years here. Its frost dates describe only those years. | 70 ft | February 11 | December 4 | 305 days |
| SANTA MARIA PUBLIC AP, CA US32°F is reached in 94.4% of years here. Its frost dates describe only those years. | 240 ft | February 18 | December 5 | 297 days |
| SANTA MONICA MUNI AP, CA US | 170 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SANTA MONICA PIER, CA US | 10 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SANTA ROSA SONOMA CO AP, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 110 ft | March 14 | November 12 | 247 days |
| SANTA ROSA, CA US32°F is reached in 99.4% of years here. Its frost dates describe only those years. | 170 ft | March 7 | November 21 | 264 days |
| SCOTIA, CA US32°F is reached in 84.3% of years here. Its frost dates describe only those years. | 140 ft | February 20 | December 5 | 311 days |
| SHAFTER 6E, CA US | 400 ft | February 27 | November 16 | 266 days |
| SHASTA DAM, CA US32°F is reached in 86.5% of years here. Its frost dates describe only those years. | 1,080 ft | March 1 | December 16 | 301 days |
| SHELTER COVE AVIATION, CA US | 250 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| SKYLINE RIDGE PRESERVE, CA US32°F is reached in 97.9% of years here. Its frost dates describe only those years. | 2,270 ft | April 7 | December 5 | 253 days |
| SO ENTRANCE YOSEMITE NP, CA US | 5,050 ft | June 1 | October 2 | 126 days |
| SONOMA, CA US32°F is reached in 99.8% of years here. Its frost dates describe only those years. | 100 ft | March 13 | November 18 | 254 days |
| SONORA, CA US | 1,670 ft | April 18 | November 1 | 200 days |
| SOUTH LAKE TAHOE AP, CA US | 6,310 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| STOCKTON FIRE STN 4, CA US32°F is reached in 97.3% of years here. Its frost dates describe only those years. | 10 ft | February 19 | November 28 | 286 days |
| STOCKTON METRO AP, CA US32°F is reached in 99.3% of years here. Its frost dates describe only those years. | 30 ft | February 17 | November 24 | 290 days |
| STONY GORGE RSVR, CA US | 800 ft | April 14 | November 6 | 210 days |
| STOVEPIPE WELLS 1 SW, CA US32°F is reached in 74.9% of years here. Its frost dates describe only those years. | 80 ft | January 11 | December 14 | 344 days |
| STRAWBERRY VALLEY, CA US | 3,810 ft | May 14 | October 19 | 163 days |
| SUSANVILLE 2SW, CA US | 4,210 ft | May 24 | October 3 | 134 days |
| SUTTER HILL CDF, CA US32°F is reached in 98.7% of years here. Its frost dates describe only those years. | 1,590 ft | March 21 | December 2 | 262 days |
| TAFT, CA US32°F is reached in 90.9% of years here. Its frost dates describe only those years. | 770 ft | February 8 | December 10 | 312 days |
| TAHOE CITY, CA US | 6,230 ft | June 15 | September 19 | 99 days |
| TAHOMA, CA US | 6,310 ft | June 10 | September 27 | 111 days |
| TEHACHAPI 4 SE, CA US | 4,220 ft | May 5 | October 17 | 170 days |
| THREE RIVERS EDISON PH 1, CA US | 1,140 ft | April 1 | November 18 | 235 days |
| TORRANCE AP, CA US32°F is reached in 11% of years here. Its frost dates describe only those years. | 90 ft | January 27 | December 16 | 365 days |
| TRACY CARBONA, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 130 ft | March 9 | November 20 | 253 days |
| TRACY PUMPING PLT, CA US32°F is reached in 93.7% of years here. Its frost dates describe only those years. | 60 ft | January 31 | December 4 | 317 days |
| TRINITY RVR HATCHERY, CA US | 1,860 ft | April 30 | October 14 | 168 days |
| TRONA, CA US | 1,690 ft | February 24 | November 21 | 275 days |
| TRUCKEE RS, CA US | 5,820 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| TRUCKEE-TAHOE AP, CA US | 5,900 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| TULELAKE, CA US | 4,040 ft | June 13 | September 8 | 88 days |
| TUOLUMNE MEADOWS RS, CA US | 8,690 ft | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station | Not calculated: frost this cold is possible year-round at this station |
| TURLOCK #2, CA US32°F is reached in 68.2% of years here. Its frost dates describe only those years. | 100 ft | January 16 | December 11 | 340 days |
| TUSTIN IRVINE RCH, CA US32°F is reached in 50.4% of years here. Its frost dates describe only those years. | 230 ft | January 14 | December 13 | 350 days |
| TWENTYNINE PALMS, CA US32°F is reached in 97.1% of years here. Its frost dates describe only those years. | 1,980 ft | February 6 | December 3 | 307 days |
| TWITCHELL DAM, CA US32°F is reached in 98.2% of years here. Its frost dates describe only those years. | 580 ft | February 27 | November 26 | 276 days |
| U C L A, CA US | 430 ft | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station | Not calculated: frost this cold is too rare at this station |
| UKIAH MUNI AP, CA US | 600 ft | March 19 | November 12 | 244 days |
| UKIAH, CA US | 640 ft | April 2 | November 12 | 231 days |
| VACAVILLE NUT TREE AP, CA US32°F is reached in 99.6% of years here. Its frost dates describe only those years. | 110 ft | March 3 | November 21 | 269 days |
| VACAVILLE, CA US32°F is reached in 95% of years here. Its frost dates describe only those years. | 110 ft | February 15 | December 3 | 301 days |
| VALLEJO, CA US32°F is reached in 74.9% of years here. Its frost dates describe only those years. | 340 ft | February 2 | December 17 | 331 days |
| VALLEY CTR 1N, CA US32°F is reached in 99.6% of years here. Its frost dates describe only those years. | 1,290 ft | March 4 | November 23 | 263 days |
| VAN NUYS AP, CA US32°F is reached in 21.7% of years here. Its frost dates describe only those years. | 770 ft | January 8 | December 19 | 365 days |
| VERDI 2W, CA US | 5,430 ft | May 19 | October 9 | 144 days |
| VICTORVILLE, CA US | 2,880 ft | March 31 | November 5 | 222 days |
| VISALIA, CA US32°F is reached in 93.4% of years here. Its frost dates describe only those years. | 300 ft | February 2 | December 6 | 310 days |
| VISTA, CA US32°F is reached in 35.1% of years here. Its frost dates describe only those years. | 430 ft | February 24 | December 24 | 365 days |
| WASCO, CA US32°F is reached in 97.4% of years here. Its frost dates describe only those years. | 290 ft | February 11 | November 29 | 300 days |
| WATSONVILLE MUNI AP, CA US32°F is reached in 94.6% of years here. Its frost dates describe only those years. | 160 ft | February 19 | December 1 | 298 days |
| WATSONVILLE WTR WKS, CA US32°F is reached in 91.4% of years here. Its frost dates describe only those years. | 100 ft | February 12 | December 4 | 306 days |
| WEAVERVILLE, CA US | 2,060 ft | May 11 | October 5 | 148 days |
| WHISKEYTOWN RSVR, CA US32°F is reached in 96.3% of years here. Its frost dates describe only those years. | 1,290 ft | February 28 | December 3 | 284 days |
| WILLITS 1 NE, CA US | 1,350 ft | May 17 | October 3 | 145 days |
| WILLOWS 6 W, CA US32°F is reached in 98.9% of years here. Its frost dates describe only those years. | 230 ft | March 13 | November 29 | 266 days |
| WINTERS, CA US32°F is reached in 99.9% of years here. Its frost dates describe only those years. | 130 ft | March 1 | November 23 | 271 days |
| WOODLAND 1 WNW, CA US32°F is reached in 97.9% of years here. Its frost dates describe only those years. | 70 ft | February 24 | November 29 | 285 days |
| WOODLAND HILLS PIERCE COLLEGE, CA US32°F is reached in 90.6% of years here. Its frost dates describe only those years. | 790 ft | February 12 | December 6 | 308 days |
| WOODSIDE FIRE STN 1, CA US32°F is reached in 99.4% of years here. Its frost dates describe only those years. | 380 ft | March 13 | November 17 | 255 days |
| WRIGHTWOOD, CA US | 6,000 ft | May 29 | October 5 | 137 days |
| YOSEMITE PARK HQ, CA US | 4,020 ft | April 30 | October 20 | 175 days |
| YOSEMITE VILLAGE 12 W, CA US | 6,620 ft | May 22 | October 21 | 157 days |
| YREKA, CA US | 2,710 ft | May 7 | October 12 | 160 days |
| YUCCA MESA, CA US32°F is reached in 98% of years here. Its frost dates describe only those years. | 3,440 ft | March 5 | December 3 | 276 days |
| YUCCA VALLEY, CA US | 3,250 ft | March 22 | November 21 | 246 days |
Data sources
- NOAA U.S. Climate Normals, frost dates, 1991–2020 normals, version 1.0.1
- Files: us-climate-normals_1991-2020_v1.0.1_annualseasonal_multivariate_by-station_c20230404.tar.gz, inventory_30yr.txt from NOAA NCEI. Retrieved October 10, 2026.
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- Methods and sources