Frost Dates and Planting Windows in Utah

The 32°F frost dates at the 169 weather stations in Utah 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 Utah

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 March 20 to June 27 across the state, and the first frost from August 26 to November 15.

32°F frost dates: earliest and latest among 169 stations, by risk level
Risk level	Earliest last frost	Latest last frost	Earliest first frost	Latest first frost
Conservative (10%)	April 5HITE RS, UT US	July 6BRIAN HEAD, UT US	August 14SNAKE CREEK POWERHOUSE, UT US	November 4HITE RS, UT US
Typical (30%)	March 20HITE RS, UT US	June 27BRIAN HEAD, UT US	August 26RANDOLPH, UT US	November 15HITE RS, UT US
Aggressive (50%)	March 9HITE RS, UT US	June 21BRIAN HEAD, UT US	September 1RANDOLPH, UT US	November 20HITE RS, UT 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.

Growing season at 32°F: shortest and longest among 169 stations
Risk level	Shortest	Longest
Conservative (90% chance of at least this long)	56 daysRANDOLPH, UT US	224 daysHITE RS, UT US
Typical (70% chance of at least this long)	68 daysRANDOLPH, UT US	241 daysHITE RS, UT US
Aggressive (50% chance of at least this long)	76 daysRANDOLPH, UT US	253 daysHITE RS, UT US

Number of stations by growing season length, Typical (70% chance of at least this long)
Growing season	Stations
60–79 days	6
80–99 days	14
100–119 days	33
120–139 days	37
140–159 days	33
160–179 days	30
180–199 days	8
200–219 days	5
220–239 days	2
240–259 days	1

Planting windows across Utah

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.

Typical planting windows (30% frost dates): earliest start and latest end among stations
Crop and task	Earliest start	Latest end	Stations
Basil: Transplant outdoors	April 3	July 11	169 of 169
Bean: Sow outdoors	March 20	June 27	169 of 169
Beet: Sow outdoors	February 20	June 27	169 of 169
Beet: Sow for fall	June 9	September 26	159 of 169
Broccoli: Transplant outdoors	February 20	June 13	169 of 169
Broccoli: Transplant for fall	May 30	September 26	162 of 169
Brussels sprouts: Transplant outdoors	February 20	June 13	169 of 169
Brussels sprouts: Transplant for fall	May 20	October 6	147 of 169
Cabbage: Transplant outdoors	February 20	June 13	169 of 169
Cabbage: Transplant for fall	May 25	September 26	159 of 169
Cantaloupe: Transplant outdoors	April 3	July 11	169 of 169
Cantaloupe: Sow outdoors	April 3	July 11	169 of 169
Carrot: Sow outdoors	February 20	June 27	169 of 169
Carrot: Sow for fall	June 9	September 16	151 of 169
Cucumber: Transplant outdoors	March 27	July 4	169 of 169
Cucumber: Sow outdoors	March 20	June 27	169 of 169
Eggplant: Transplant outdoors	April 3	July 11	169 of 169
Garlic: Plant for fall	August 26	November 29	169 of 169
Lettuce: Transplant outdoors	February 20	June 13	169 of 169
Lettuce: Sow outdoors	February 20	June 13	169 of 169
Lettuce: Sow for fall	May 30	October 6	162 of 169
Onion: Transplant or plant sets	February 20	June 13	169 of 169
Peas: Sow outdoors	February 20	June 13	169 of 169
Peas: Sow for fall	June 7	September 26	168 of 169
Pepper: Transplant outdoors	April 3	July 11	169 of 169
Potato: Plant seed potatoes	February 20	June 27	169 of 169
Pumpkin: Sow outdoors	April 3	July 11	169 of 169
Radish: Sow outdoors	February 20	June 13	169 of 169
Radish: Sow for fall	July 8	October 26	169 of 169
Spinach: Transplant outdoors	February 20	June 13	169 of 169
Spinach: Sow outdoors	February 20	June 13	169 of 169
Spinach: Sow for fall	June 13	October 9	169 of 169
Summer squash: Transplant outdoors	March 27	July 4	169 of 169
Summer squash: Sow outdoors	March 20	June 27	169 of 169
Sweet corn: Sow outdoors	March 20	June 27	169 of 169
Sweet potato: Plant slips	March 27	July 11	169 of 169
Tomato: Transplant outdoors	April 3	July 11	169 of 169
Turnip: Sow outdoors	February 20	June 13	169 of 169
Turnip: Sow for fall	June 13	October 6	169 of 169
Watermelon: Transplant outdoors	April 3	July 11	169 of 169
Watermelon: Sow outdoors	April 3	July 11	169 of 169

Weather stations in Utah

Every station in Utah with NOAA frost-date normals, with its Typical 32°F frost dates and growing season. 5 of them have no 32°F frost dates.

Typical (30%) 32°F frost dates by station
Station	Elevation	Last frost	First frost	Growing season
ALPINE, UT US	5,100 ft	May 12	October 5	150 days
ALTA, UT US	8,710 ft	June 18	September 13	88 days
ALTAMONT, UT US	6,460 ft	June 5	September 16	103 days
ALTON, UT US	7,100 ft	June 6	September 24	112 days
ANGLE, UT US	6,410 ft	June 23	September 6	76 days
ARCHES NP HQS, UT US	4,090 ft	April 10	October 23	197 days
BEAR LAKE SP, UT US	5,930 ft	May 24	September 30	130 days
BEAVER CANYON PWR HOUSE, UT US	7,270 ft	June 6	September 23	110 days
BIG WATER, UT US	4,100 ft	April 17	October 25	194 days
BLACK ROCK, UT US	4,920 ft	June 1	September 22	115 days
BLANDING, UT US	6,030 ft	May 3	October 14	166 days
BLOWHARD MTN RADAR, UT US	10,690 ft	June 13	September 23	101 days
BLUFF, UT US	4,320 ft	April 30	October 7	164 days
BOULDER, UT US	6,650 ft	May 12	October 7	151 days
BOUNTIFUL BENCH, UT US	4,950 ft	May 1	October 18	171 days
BOUNTIFUL-VAL VERDA, UT US	4,540 ft	April 30	October 13	169 days
BRIAN HEAD, UT US	9,770 ft	June 27	September 8	74 days
BRIGHAM CITY 28 WNW, UT US	4,950 ft	May 22	September 30	132 days
BRIGHAM CITY WASTE PLT, UT US	4,240 ft	May 14	September 29	140 days
BRYCE CANYON AP, UT US	7,590 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
BRYCE CANYON NP HQRS, UT US	7,890 ft	May 31	September 22	117 days
BULLFROG BASIN, UT US	3,820 ft	April 1	November 5	218 days
CALLAO, UT US	4,340 ft	May 22	September 23	125 days
CANYONLANDS-THE NECK, UT US	5,870 ft	May 1	October 15	169 days
CANYONLANDS-THE NEEDLES, UT US	4,910 ft	May 6	October 5	156 days
CAPITOL REEF NP, UT US	5,500 ft	April 25	October 23	183 days
CASTLE DALE, UT US	5,630 ft	May 26	September 22	120 days
CASTLE VALLEY 1SE, UT US	4,900 ft	April 25	October 16	176 days
CASTLE VALLEY, UT US	4,730 ft	April 24	October 17	177 days
CEDAR BREAKS NM, UT US	10,370 ft	June 18	September 28	102 days
CEDAR CITY 5E, UT US	6,460 ft	May 31	September 28	121 days
CEDAR CITY MUNI AP, UT US	5,590 ft	May 30	September 25	121 days
CEDAR CITY, UT US	6,090 ft	May 14	October 7	148 days
CEDAR PT, UT US	6,760 ft	May 23	October 5	136 days
CIRCLEVILLE, UT US	6,050 ft	June 1	September 21	115 days
CITY CREEK WTP, UT US	5,340 ft	May 20	October 2	137 days
COALVILLE 13 E, UT US	6,510 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
COALVILLE, UT US	5,550 ft	June 15	September 5	85 days
COTTONWOOD WEIR, UT US	4,990 ft	May 8	October 16	163 days
CUTLER DAM, UT US	4,290 ft	May 11	October 5	149 days
DEER CREEK DAM, UT US	5,270 ft	June 4	September 18	109 days
DELTA, UT US	4,620 ft	May 23	September 24	128 days
DESERET, UT US	4,590 ft	May 20	September 25	128 days
DEWEY, UT US	4,120 ft	May 2	October 5	158 days
DINOSAUR NM-QUARRY AREA, UT US	4,800 ft	May 9	October 2	147 days
DRAPER-POINT OF MTN, UT US	4,510 ft	April 25	October 16	176 days
DUCHESNE, UT US	5,550 ft	May 13	October 1	141 days
DUGWAY, UT US	4,350 ft	May 18	September 27	133 days
ECHO DAM, UT US	5,470 ft	June 5	September 13	101 days
EDEN-LIBERTY, UT US	5,190 ft	June 4	September 21	112 days
ELECTRIC LAKE, UT US	8,380 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
ENTERPRISE BERYL JCT, UT US	5,150 ft	June 5	September 15	101 days
ENTERPRISE, UT US	5,320 ft	May 30	September 27	123 days
EPHRAIM, UT US	5,500 ft	June 4	September 14	105 days
ESCALANTE, UT US	5,810 ft	May 15	October 4	146 days
ESKDALE, UT US	4,980 ft	May 20	September 26	131 days
FAIRFIELD, UT US	4,880 ft	June 11	September 10	93 days
FARMINGTON 3 NW, UT US	4,380 ft	April 27	October 13	171 days
FERRON, UT US	5,920 ft	May 14	October 5	146 days
FILLMORE, UT US	5,130 ft	May 12	October 7	150 days
FISH SPRINGS NWR, UT US	4,360 ft	May 2	October 8	160 days
FLAMING GORGE, UT US	6,240 ft	June 2	September 17	111 days
FREMONT INDIAN SP, UT US	5,920 ft	June 11	September 16	97 days
FT DUCHESNE, UT US	5,050 ft	May 31	September 27	123 days
GARFIELD, UT US	4,300 ft	April 11	October 28	203 days
GOBLIN VALLEY SP, UT US	4,960 ft	May 1	October 12	164 days
GRANITE PEAK DUGWAY PG, UT US	4,300 ft	April 25	October 10	170 days
GRANTSVILLE 2W, UT US	4,550 ft	May 8	October 8	155 days
GROUSE CREEK, UT US	5,320 ft	June 11	September 10	94 days
HANKSVILLE, UT US	4,310 ft	May 13	September 29	141 days
HANS FLAT RS, UT US	6,600 ft	May 9	October 9	153 days
HATCH, UT US	6,890 ft	June 25	September 8	75 days
HEBER, UT US	5,590 ft	June 11	September 14	98 days
HITE RS, UT US	3,850 ft	March 20	November 15	241 days
HOVENWEEP NM, UT US	5,240 ft	May 9	October 4	151 days
HUNTSVILLE MONASTERY, UT US	5,140 ft	June 11	September 10	92 days
IBAPAH, UT US	5,280 ft	June 21	September 3	75 days
JARVIE RCH, UT US	5,450 ft	May 25	September 23	123 days
JENSEN, UT US	4,740 ft	May 27	September 19	117 days
JOHNSON PASS, UT US	5,580 ft	May 23	September 30	133 days
KAMAS, UT US	6,480 ft	June 13	September 11	92 days
KANAB, UT US	4,900 ft	May 5	October 16	166 days
KANOSH, UT US	4,380 ft	May 8	October 12	162 days
KODACHROME BASIN PARK, UT US	5,810 ft	June 7	September 23	108 days
KOOSHAREM, UT US	6,930 ft	June 14	September 15	95 days
LA SAL 1SW, UT US	6,790 ft	May 25	October 1	132 days
LA VERKIN, UT US	3,190 ft	April 10	October 31	205 days
LAKETOWN, UT US	5,980 ft	June 5	September 18	109 days
LEVAN, UT US	5,300 ft	May 18	October 1	138 days
LITTLE SAHARA REC AREA, UT US	5,230 ft	May 24	September 26	125 days
LOA, UT US	7,070 ft	June 5	September 16	104 days
LOGAN 5 SW EXP FARM, UT US	4,490 ft	May 18	September 22	129 days
LOGAN CACHE AP, UT US	4,450 ft	May 15	September 27	135 days
LOGAN RADIO KVNU, UT US	4,480 ft	May 16	September 26	135 days
LOGAN UTAH ST UNIV, UT US	4,790 ft	May 6	October 10	157 days
LYTLE RCH, UT US	2,790 ft	April 1	November 3	221 days
MAESER 9NW, UT US	6,450 ft	May 24	September 30	133 days
MANILA, UT US	6,390 ft	May 31	September 24	119 days
MANTI RADIO KMTI, UT US	5,500 ft	June 5	September 16	105 days
MANTI, UT US	5,740 ft	May 19	October 1	136 days
MARYSVALE, UT US	5,850 ft	May 31	September 19	113 days
MEXICAN HAT, UT US	4,110 ft	April 17	October 25	193 days
MILFORD MUNI AP, UT US	5,040 ft	May 21	September 29	134 days
MILFORD, UT US	5,010 ft	May 19	September 28	133 days
MOAB CANYONLAND AP, UT US	4,560 ft	April 29	October 14	171 days
MOAB, UT US	4,050 ft	April 18	October 17	183 days
MODENA, UT US	5,460 ft	May 28	September 28	127 days
MONTICELLO #2, UT US	7,090 ft	May 24	October 1	132 days
MONTICELLO 2E, UT US	6,820 ft	May 27	September 28	125 days
MOON LAKE, UT US	8,130 ft	June 17	September 13	90 days
MORGAN, UT US	5,100 ft	June 3	September 18	110 days
MORONI, UT US	5,580 ft	June 3	September 19	110 days
MTN DELL DAM, UT US	5,420 ft	May 13	October 6	147 days
MYTON, UT US	5,080 ft	May 14	September 29	140 days
NATURAL BRIDGES NM, UT US	6,510 ft	May 13	October 6	147 days
NEOLA, UT US	5,950 ft	May 29	September 24	121 days
NEPHI, UT US	5,150 ft	May 13	October 4	146 days
NEW HARMONY, UT US	5,170 ft	May 17	October 4	145 days
OAK CITY, UT US	5,100 ft	May 10	October 6	153 days
OGDEN HINKLEY AP, UT US	4,470 ft	April 29	October 16	172 days
OGDEN NE BENCH, UT US	4,570 ft	April 26	October 16	176 days
OGDEN PIONEER PH, UT US	4,350 ft	April 28	October 17	175 days
OGDEN SUGAR FACTORY, UT US	4,280 ft	April 30	October 11	167 days
ORDERVILLE, UT US	5,460 ft	May 23	October 2	135 days
OREM TRTMT PLT, UT US	4,510 ft	April 26	October 13	172 days
OURAY 4NE, UT US	4,670 ft	May 7	September 28	146 days
PANGUITCH, UT US	6,650 ft	June 18	September 7	83 days
PARIA RS, UT US	4,430 ft	April 26	October 17	176 days
PARK CITY, UT US	6,900 ft	June 4	September 20	109 days
PARTOUN, UT US	4,780 ft	May 21	September 24	128 days
PINEVIEW DAM, UT US	4,940 ft	May 30	September 20	116 days
PLEASANT GROVE, UT US	4,690 ft	April 26	October 19	178 days
PRICE CARBON CO AP, UT US	5,920 ft	May 10	October 6	152 days
PROVO BYU, UT US	4,570 ft	April 25	October 16	175 days
RANDOLPH, UT US	6,290 ft	June 20	August 26	68 days
RICHFIELD RADIO KSVC, UT US	5,290 ft	May 29	September 20	115 days
RICHMOND, UT US	4,680 ft	May 20	September 30	133 days
ROOSEVELT RADIO, UT US	5,010 ft	May 31	September 17	112 days
ROSETTE, UT US	5,690 ft	May 31	September 26	121 days
SALINA 24 E, UT US	7,560 ft	June 3	September 20	110 days
SALT LAKE CITY E BENCH, UT US	4,850 ft	May 1	October 12	167 days
SALT LAKE CITY INTL AP, UT US	4,230 ft	April 16	October 25	193 days
SALT LAKE TRIAD CTR, UT US	4,280 ft	April 7	November 1	212 days
SANTAQUIN CHLORINATOR, UT US	5,160 ft	May 14	October 5	147 days
SCIPIO, UT US	5,310 ft	May 31	September 19	111 days
SCOFIELD DAM, UT US	7,630 ft	June 22	September 7	78 days
SCOFIELD-SKYLINE MINE, UT US	8,700 ft	June 21	September 11	84 days
SILVER LAKE BRIGHTON, UT US	8,740 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
SNAKE CREEK POWERHOUSE, UT US	6,010 ft	June 7	September 1	88 days
SPANISH FK PWR HOUSE, UT US	4,720 ft	May 2	October 12	165 days
ST GEORGE, UT US	2,860 ft	March 25	November 5	228 days
SUNDANCE, UT US	6,620 ft	May 28	September 30	128 days
SUNNYSIDE CITY CTR, UT US	6,530 ft	May 13	October 7	149 days
SUNNYSIDE CITY, UT US	6,510 ft	May 2	October 18	170 days
THIOKOL PROPULSION F S, UT US	4,600 ft	May 26	September 19	117 days
TIMPANOGOS CAVE, UT US	5,740 ft	May 10	October 8	150 days
TOOELE, UT US	4,940 ft	May 11	October 11	155 days
TORREY 7 E, UT US	6,200 ft	April 29	October 18	174 days
TREMONTON, UT US	4,310 ft	April 30	October 11	166 days
TRENTON, UT US	4,460 ft	May 25	September 11	112 days
UTAH LAKE LEHI, UT US	4,500 ft	May 8	October 2	149 days
UTAH TEST RANGE, UT US	4,440 ft	May 23	September 27	130 days
VALLEY OF THE GODS, UT US	5,290 ft	April 4	November 1	214 days
VERNAL MUNICIPAL AP, UT US	5,260 ft	May 12	October 2	145 days
VERNAL, UT US	5,350 ft	May 15	September 30	140 days
VERNON, UT US	5,470 ft	June 8	September 13	101 days
VEYO POWERHOUSE, UT US	4,600 ft	April 16	October 29	198 days
WAH WAH RCH, UT US	4,880 ft	May 28	September 24	120 days
WANSHIP DAM, UT US	5,940 ft	June 20	September 6	81 days
WEBER BASIN PUMP PLT 3, UT US	4,900 ft	May 6	October 12	159 days
WELLINGTON 3 E, UT US	5,400 ft	June 2	September 21	114 days
WENDOVER AP AWOS, UT US	4,240 ft	April 25	October 19	179 days
WOODRUFF, UT 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
ZION NP, UT US	4,040 ft	April 21	October 28	192 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.