Frost Dates and Planting Windows in Wisconsin
The 32°F frost dates at the 204 weather stations in Wisconsin 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 Wisconsin
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 April 25 to June 11 across the state, and the first frost from September 11 to October 24.
| Risk level | Earliest last frost | Latest last frost | Earliest first frost | Latest first frost |
|---|---|---|---|---|
| Conservative (10%) | May 2MILWAUKEE MITCHELL AP, WI US | June 27NORTH PELICAN, WI US | September 1NORTH PELICAN, WI US | October 15MILWAUKEE MITCHELL AP, WI US |
| Typical (30%) | April 252 stations | June 11NORTH PELICAN, WI US | September 11NORTH PELICAN, WI US | October 24MILWAUKEE MITCHELL AP, WI US |
| Aggressive (50%) | April 192 stations | June 3NORTH PELICAN, WI US | September 18NORTH PELICAN, WI US | October 29MILWAUKEE MITCHELL AP, WI 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) | 74 daysNORTH PELICAN, WI US | 173 daysMILWAUKEE MITCHELL AP, WI US |
| Typical (70% chance of at least this long) | 96 daysNORTH PELICAN, WI US | 184 daysMILWAUKEE MITCHELL AP, WI US |
| Aggressive (50% chance of at least this long) | 106 daysNORTH PELICAN, WI US | 192 daysMILWAUKEE MITCHELL AP, WI US |
| Growing season | Stations |
|---|---|
| 80–99 days | 1 |
| 100–119 days | 22 |
| 120–139 days | 49 |
| 140–159 days | 102 |
| 160–179 days | 28 |
| 180–199 days | 2 |
Planting windows across Wisconsin
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 | May 9 | June 25 | 204 of 204 |
| Bean: Sow outdoors | April 25 | June 11 | 204 of 204 |
| Beet: Sow outdoors | March 28 | June 11 | 204 of 204 |
| Beet: Sow for fall | June 19 | September 4 | 204 of 204 |
| Broccoli: Transplant outdoors | March 28 | May 28 | 204 of 204 |
| Broccoli: Transplant for fall | June 9 | September 4 | 204 of 204 |
| Brussels sprouts: Transplant outdoors | March 28 | May 28 | 204 of 204 |
| Brussels sprouts: Transplant for fall | May 23 | September 14 | 203 of 204 |
| Cabbage: Transplant outdoors | March 28 | May 28 | 204 of 204 |
| Cabbage: Transplant for fall | June 4 | September 4 | 204 of 204 |
| Cantaloupe: Transplant outdoors | May 9 | June 25 | 204 of 204 |
| Cantaloupe: Sow outdoors | May 9 | June 25 | 204 of 204 |
| Carrot: Sow outdoors | March 28 | June 11 | 204 of 204 |
| Carrot: Sow for fall | June 12 | August 25 | 203 of 204 |
| Cucumber: Transplant outdoors | May 2 | June 18 | 204 of 204 |
| Cucumber: Sow outdoors | April 25 | June 11 | 204 of 204 |
| Eggplant: Transplant outdoors | May 9 | June 25 | 204 of 204 |
| Garlic: Plant for fall | September 11 | November 7 | 204 of 204 |
| Lettuce: Transplant outdoors | March 28 | May 28 | 204 of 204 |
| Lettuce: Sow outdoors | March 28 | May 28 | 204 of 204 |
| Lettuce: Sow for fall | June 9 | September 14 | 204 of 204 |
| Onion: Transplant or plant sets | March 28 | May 28 | 204 of 204 |
| Peas: Sow outdoors | March 28 | May 28 | 204 of 204 |
| Peas: Sow for fall | June 17 | September 4 | 204 of 204 |
| Pepper: Transplant outdoors | May 9 | June 25 | 204 of 204 |
| Potato: Plant seed potatoes | March 28 | June 11 | 204 of 204 |
| Pumpkin: Sow outdoors | May 9 | June 25 | 204 of 204 |
| Radish: Sow outdoors | March 28 | May 28 | 204 of 204 |
| Radish: Sow for fall | July 24 | October 4 | 204 of 204 |
| Spinach: Transplant outdoors | March 28 | May 28 | 204 of 204 |
| Spinach: Sow outdoors | March 28 | May 28 | 204 of 204 |
| Spinach: Sow for fall | June 29 | September 17 | 204 of 204 |
| Summer squash: Transplant outdoors | May 2 | June 18 | 204 of 204 |
| Summer squash: Sow outdoors | April 25 | June 11 | 204 of 204 |
| Sweet corn: Sow outdoors | April 25 | June 11 | 204 of 204 |
| Sweet potato: Plant slips | May 2 | June 25 | 204 of 204 |
| Tomato: Transplant outdoors | May 9 | June 25 | 204 of 204 |
| Turnip: Sow outdoors | March 28 | May 28 | 204 of 204 |
| Turnip: Sow for fall | June 29 | September 14 | 204 of 204 |
| Watermelon: Transplant outdoors | May 9 | June 25 | 204 of 204 |
| Watermelon: Sow outdoors | May 9 | June 25 | 204 of 204 |
Weather stations in Wisconsin
Every station in Wisconsin with NOAA frost-date normals, with its Typical 32°F frost dates and growing season. 1 of them have no 32°F frost dates.
| Station | Elevation | Last frost | First frost | Growing season |
|---|---|---|---|---|
| AFTON - JANESVILLE WWTP, WI US | 760 ft | May 1 | October 10 | 162 days |
| ALMA DAM 4, WI US | 670 ft | May 2 | October 7 | 160 days |
| AMERY, WI US | 1,070 ft | May 11 | September 29 | 143 days |
| ANTIGO, WI US | 1,520 ft | May 20 | September 24 | 130 days |
| APPLETON, WI US | 790 ft | May 10 | October 1 | 146 days |
| ARLINGTON, WI US | 1,050 ft | May 10 | October 1 | 146 days |
| ASHLAND 3S, WI US | 830 ft | May 26 | September 27 | 125 days |
| ASHLAND KENNEDY MEM AP, WI US | 830 ft | May 29 | September 23 | 117 days |
| AUGUSTA RS, WI US | 960 ft | May 12 | September 26 | 139 days |
| BALDWIN, WI US | 1,100 ft | May 12 | September 26 | 140 days |
| BARABOO, WI US | 820 ft | May 12 | September 30 | 143 days |
| BAYFIELD 6 N, WI US | 820 ft | May 27 | October 1 | 131 days |
| BAYFIELD FISH HATCHERY, WI US | 620 ft | May 29 | September 27 | 124 days |
| BEAVER DAM WWTP, WI US | 860 ft | May 7 | October 3 | 149 days |
| BELGIUM WWTP, WI US | 730 ft | May 13 | October 6 | 151 days |
| BELOIT, WI US | 790 ft | May 7 | October 6 | 154 days |
| BERLIN WWTP, WI US | 770 ft | May 7 | October 1 | 150 days |
| BIG FALLS HYDRO, WI US | 1,210 ft | May 13 | September 27 | 138 days |
| BLAIR, WI US | 850 ft | May 15 | September 25 | 136 days |
| BLOOMER, WI US | 990 ft | May 11 | September 28 | 143 days |
| BOSCOBEL AP, WI US | 670 ft | May 10 | October 2 | 148 days |
| BRILLION, WI US | 810 ft | May 12 | October 1 | 143 days |
| BRODHEAD WWTP, WI US | 780 ft | May 4 | October 5 | 156 days |
| BROOKFIELD WWTP, WI US | 830 ft | May 5 | October 7 | 155 days |
| BRULE RS, WI US | 1,000 ft | May 30 | September 19 | 115 days |
| BURLINGTON, WI US | 750 ft | May 11 | October 2 | 147 days |
| BUTTERNUT 3SW, WI US | 1,570 ft | May 28 | September 19 | 117 days |
| CASHTON 3NNW, WI US | 940 ft | May 11 | September 27 | 143 days |
| CASHTON, WI US | 1,370 ft | May 3 | October 8 | 162 days |
| CHARMANY FARM, WI US | 1,050 ft | May 3 | October 9 | 160 days |
| CHILTON, WI US | 840 ft | May 7 | October 7 | 154 days |
| CLAM LAKE 4W, WI US | 1,500 ft | May 21 | September 24 | 129 days |
| CLINTON WWTP, WI US | 920 ft | May 6 | October 4 | 152 days |
| CLINTONVILLE, WI US | 800 ft | May 10 | October 1 | 146 days |
| COUDERAY 7 W, WI US | 1,300 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 |
| CRIVITZ HIGH FALLS, WI US | 950 ft | June 1 | September 17 | 110 days |
| CUMBERLAND, WI US | 1,240 ft | May 9 | September 30 | 145 days |
| DALTON, WI US | 860 ft | May 13 | September 28 | 142 days |
| DANBURY, WI US | 950 ft | May 18 | September 24 | 130 days |
| DARLINGTON WWTP, WI US | 850 ft | May 10 | September 28 | 145 days |
| DELAVAN WWTP, WI US | 880 ft | May 4 | October 7 | 158 days |
| DENMARK WWTP, WI US | 810 ft | May 11 | October 6 | 151 days |
| DODGE, WI US | 690 ft | May 11 | October 1 | 145 days |
| DODGEVILLE WWTP, WI US | 1,120 ft | May 9 | October 2 | 150 days |
| DRUMMOND, WI US | 1,340 ft | May 26 | September 27 | 124 days |
| DURAND, WI US | 710 ft | May 6 | October 4 | 154 days |
| EAGLE RVR, WI US | 1,620 ft | May 30 | September 18 | 113 days |
| EAU CLAIRE 3SW, WI US | 880 ft | April 30 | October 7 | 161 days |
| EAU CLAIRE RGNL AP, WI US | 880 ft | May 13 | September 29 | 140 days |
| ELLSWORTH 1E, WI US | 1,030 ft | May 19 | September 24 | 132 days |
| EPHRAIM 1NE-WWTP, WI US | 730 ft | May 20 | October 10 | 147 days |
| FLORENCE, WI US | 1,300 ft | May 30 | September 18 | 112 days |
| FOND DU LAC 2 SW, WI US | 770 ft | May 2 | October 12 | 166 days |
| FOND DU LAC CO AP, WI US | 810 ft | May 8 | October 4 | 152 days |
| FOND DU LAC WWTP, WI US | 750 ft | May 8 | October 6 | 155 days |
| FORESTVILLE-4E, WI US | 690 ft | May 12 | October 10 | 155 days |
| FOXBORO, WI US | 930 ft | June 6 | September 17 | 105 days |
| FRIENDSHIP, WI US | 940 ft | May 15 | September 27 | 138 days |
| FT ATKINSON, WI US | 800 ft | May 5 | October 6 | 157 days |
| GAYS MILLS, WI US | 690 ft | May 9 | October 2 | 149 days |
| GENOA DAM 8, WI US | 640 ft | April 28 | October 12 | 171 days |
| GERMANTOWN, WI US | 850 ft | May 14 | October 3 | 145 days |
| GOODMAN SANITARY DIST, WI US | 1,450 ft | May 31 | September 24 | 118 days |
| GORDON, WI US | 1,040 ft | May 28 | September 20 | 118 days |
| GRAFTON WWTP, WI US | 740 ft | April 30 | October 18 | 173 days |
| GRANTSBURG, WI US | 990 ft | May 18 | September 25 | 131 days |
| GREEN BAY BOTANICAL, WI US | 690 ft | May 13 | October 2 | 146 days |
| GREEN BAY WFO, WI US | 680 ft | May 7 | October 5 | 153 days |
| GREEN BAY, WI US | 680 ft | May 7 | October 3 | 153 days |
| HALES CORNERS/WHITNALL PARK/BO, WI US | 770 ft | May 9 | October 8 | 154 days |
| HANCOCK EXP FARM, WI US | 1,090 ft | May 16 | September 27 | 137 days |
| HARTFORD WWTP, WI US | 960 ft | May 14 | September 29 | 141 days |
| HAYWARD MUNI AP, WI US | 1,200 ft | May 29 | September 15 | 112 days |
| HAYWARD RS, WI US | 1,200 ft | May 29 | September 16 | 113 days |
| HILLSBORO 2SW, WI US | 1,040 ft | May 18 | September 24 | 131 days |
| HILLSBORO, WI US | 940 ft | May 11 | September 30 | 145 days |
| HINGHAM WWTP, WI US | 760 ft | May 8 | October 10 | 157 days |
| HOLCOMBE, WI US | 1,060 ft | May 12 | September 28 | 140 days |
| HORICON WWTP, WI US | 880 ft | May 8 | October 4 | 150 days |
| HURLEY, WI US | 1,440 ft | May 30 | September 22 | 118 days |
| HUSTISFORD WWTP, WI US | 860 ft | May 3 | October 4 | 156 days |
| JACKSON, WI US | 900 ft | May 6 | October 9 | 158 days |
| JEFFERSON WWTP, WI US | 780 ft | May 1 | October 12 | 165 days |
| JIM FALLS 3NW, WI US | 1,070 ft | May 7 | October 1 | 150 days |
| JUMP RVR 3E, WI US | 1,270 ft | May 27 | September 17 | 116 days |
| KENOSHA RGNL AP, WI US | 740 ft | May 3 | October 14 | 164 days |
| KENOSHA, WI US | 600 ft | April 25 | October 21 | 182 days |
| KEWAUNEE, WI US | 590 ft | May 6 | October 11 | 159 days |
| LA CROSSE MUNI AP, WI US | 650 ft | April 30 | October 11 | 169 days |
| LA CROSSE WFO, WI US | 1,310 ft | May 2 | October 6 | 159 days |
| LADYSMITH 3W, WI US | 1,130 ft | June 2 | September 16 | 109 days |
| LAKE GENEVA WWTP, WI US | 850 ft | April 30 | October 15 | 171 days |
| LAKE MILLS WWTP, WI US | 810 ft | May 4 | October 8 | 158 days |
| LAKEWOOD 3 NE, WI US | 1,200 ft | May 27 | September 21 | 121 days |
| LANCASTER 4 WSW, WI US | 1,040 ft | May 3 | October 5 | 158 days |
| LAONA 6 SW, WI US | 1,690 ft | May 25 | September 24 | 123 days |
| LODI, WI US | 820 ft | May 6 | October 4 | 154 days |
| LONE ROCK TRI CO AP, WI US | 720 ft | May 6 | October 3 | 153 days |
| LUCK, WI US | 1,220 ft | May 12 | September 28 | 141 days |
| LYNXVILLE DAM 9, WI US | 630 ft | May 1 | October 11 | 166 days |
| MADELINE ISLAND, WI US | 660 ft | May 26 | October 4 | 131 days |
| MADISON DANE RGNL AP, WI US | 870 ft | May 7 | October 4 | 153 days |
| MANITOWOC, WI US | 580 ft | May 6 | October 13 | 163 days |
| MARINETTE, WI US | 590 ft | May 10 | October 5 | 152 days |
| MARKESAN, WI US | 860 ft | May 15 | September 27 | 137 days |
| MARSHFIELD EXP FARM, WI US | 1,240 ft | May 11 | September 30 | 143 days |
| MARSHFIELD MUNI AP, WI US | 1,250 ft | May 11 | September 30 | 144 days |
| MATHER 3 NW, WI US | 980 ft | May 12 | September 29 | 141 days |
| MAUSTON 1 SE, WI US | 870 ft | May 7 | October 2 | 150 days |
| MAZOMANIE WWTP, WI US | 760 ft | May 13 | September 26 | 140 days |
| MEDFORD, WI US | 1,470 ft | May 18 | September 26 | 134 days |
| MELLEN 4 NE, WI US | 1,300 ft | May 31 | September 22 | 117 days |
| MENOMONIE, WI US | 780 ft | May 16 | September 26 | 135 days |
| MERRILL, WI US | 1,250 ft | May 18 | September 25 | 131 days |
| MILWAUKEE MITCHELL AP, WI US | 670 ft | April 25 | October 24 | 184 days |
| MINOCQUA, WI US | 1,600 ft | May 29 | September 20 | 118 days |
| MINONG 5 WSW, WI US | 1,080 ft | May 17 | September 29 | 136 days |
| MONDOVI, WI US | 830 ft | May 16 | September 27 | 136 days |
| MONROE WWTP, WI US | 990 ft | May 2 | October 8 | 160 days |
| MONTELLO, WI US | 790 ft | May 9 | September 30 | 145 days |
| MT MARY COLLEGE, WI US | 710 ft | May 2 | October 12 | 165 days |
| NECEDAH 5 WNW, WI US | 930 ft | May 5 | September 28 | 149 days |
| NECEDAH, WI US | 920 ft | May 23 | September 19 | 122 days |
| NEILLSVILLE 3ESE, WI US | 1,080 ft | May 16 | September 26 | 135 days |
| NEW LONDON, WI US | 800 ft | May 10 | October 1 | 144 days |
| NORTH PELICAN, WI US | 1,610 ft | June 11 | September 11 | 96 days |
| OCONOMOWOC WWTP, WI US | 860 ft | May 6 | October 6 | 156 days |
| OCONTO 4 W, WI US | 660 ft | May 15 | October 1 | 142 days |
| OSHKOSH WITTMAN AP, WI US | 780 ft | May 5 | October 6 | 157 days |
| OSHKOSH, WI US | 750 ft | April 30 | October 13 | 169 days |
| OWEN 1E, WI US | 1,240 ft | May 19 | September 21 | 126 days |
| PADDOCK LAKE, WI US | 770 ft | May 6 | October 9 | 159 days |
| PARK FALLS DNR HQ, WI US | 1,520 ft | May 21 | September 23 | 126 days |
| PATTISON RANGER STAION, WI US | 1,100 ft | May 25 | September 28 | 127 days |
| PELL LAKE, WI US | 840 ft | May 6 | October 7 | 157 days |
| PESHTIGO, WI US | 600 ft | May 18 | September 30 | 137 days |
| PLATTEVILLE, WI US | 990 ft | May 4 | October 7 | 158 days |
| PLYMOUTH WWTP, WI US | 830 ft | May 10 | October 4 | 150 days |
| PORT WASHINGTON, WI US | 590 ft | May 4 | October 17 | 167 days |
| PORT WING, WI US | 650 ft | June 5 | September 27 | 115 days |
| PORTAGE WWTP, WI US | 790 ft | May 3 | October 3 | 156 days |
| PRAIRIE DU CHIEN, WI US | 660 ft | May 3 | October 6 | 158 days |
| PRENTICE #2, WI US | 1,540 ft | May 29 | September 16 | 115 days |
| RACINE BATTEN AP, WI US | 670 ft | April 30 | October 19 | 173 days |
| RACINE, WI US | 600 ft | April 27 | October 18 | 175 days |
| REEDSBURG, WI US | 930 ft | May 7 | October 1 | 149 days |
| REST LAKE, WI US | 1,610 ft | May 31 | September 14 | 106 days |
| RHINELANDER 4NE, WI US | 1,590 ft | May 29 | September 17 | 114 days |
| RHINELANDER ONEIDA AP, WI US | 1,600 ft | June 1 | September 16 | 111 days |
| RHINELANDER, WI US | 1,570 ft | May 27 | September 18 | 117 days |
| RICE LAKE, WI US | 1,100 ft | May 14 | September 27 | 137 days |
| RICE RSVR TOMAHAWK-2, WI US | 1,460 ft | May 17 | September 29 | 137 days |
| RICHFIELD 3 SSW, WI US | 980 ft | May 6 | October 10 | 159 days |
| RICHLAND CTR, WI US | 730 ft | May 11 | October 1 | 146 days |
| RIDGELAND 1NNE, WI US | 1,080 ft | May 17 | September 23 | 131 days |
| RIPON 5 NE, WI US | 930 ft | May 6 | October 5 | 155 days |
| RIVER FALLS, WI US | 940 ft | May 17 | September 26 | 134 days |
| ROCHESTER WWTP, WI US | 780 ft | May 12 | October 4 | 147 days |
| ROCK SPRINGS 3 SW, WI US | 1,260 ft | April 30 | October 14 | 169 days |
| ROSHOLT 9 NNE, WI US | 1,180 ft | May 12 | September 30 | 142 days |
| SAUK CITY WWTP, WI US | 750 ft | May 10 | October 1 | 147 days |
| SAUKVILLE WWTP, WI US | 770 ft | May 10 | October 6 | 151 days |
| SAXON 1WSW, WI US | 1,170 ft | May 28 | September 26 | 123 days |
| SHAWANO 2SSW, WI US | 810 ft | May 15 | September 27 | 136 days |
| SHEBOYGAN CO MEM AP, WI US | 750 ft | May 13 | October 2 | 144 days |
| SHEBOYGAN WWTP, WI US | 600 ft | May 9 | October 14 | 160 days |
| SHEBOYGAN, WI US | 650 ft | May 1 | October 17 | 172 days |
| SLINGER WWTP, WI US | 1,030 ft | May 11 | October 1 | 144 days |
| SOLON SPRINGS, WI US | 1,130 ft | May 18 | September 27 | 133 days |
| SOUTH MILWAUKEE WWTP, WI US | 650 ft | April 29 | October 20 | 176 days |
| SPARTA, WI US | 780 ft | May 15 | September 26 | 138 days |
| SPOONER AG RES STN, WI US | 1,100 ft | May 21 | September 22 | 127 days |
| ST CROIX FALLS, WI US | 750 ft | May 9 | October 1 | 148 days |
| ST GERMAIN, WI US | 1,640 ft | May 24 | September 27 | 129 days |
| STANLEY WWTP, WI US | 1,080 ft | May 13 | September 28 | 139 days |
| STEUBEN 4 SE, WI US | 1,020 ft | April 30 | October 14 | 170 days |
| STEVENS PT, WI US | 1,080 ft | May 10 | October 1 | 147 days |
| STOCKBRIDGE-MUNSEE RSVN, WI US | 1,050 ft | May 19 | September 25 | 132 days |
| STOUGHTON, WI US | 840 ft | May 5 | October 5 | 155 days |
| STURGEON BAY EXP FARM, WI US | 700 ft | May 13 | October 6 | 149 days |
| SULLIVAN 3SE, WI US | 930 ft | May 10 | October 2 | 149 days |
| SUPERIOR, WI US | 610 ft | May 15 | October 2 | 145 days |
| SURING, WI US | 790 ft | May 21 | September 27 | 131 days |
| TOWN OF WESTFORD, WI US | 880 ft | May 6 | October 5 | 155 days |
| TREMPEALEAU DAM 6, WI US | 660 ft | May 4 | October 5 | 157 days |
| TWO RIVERS, WI US | 590 ft | May 2 | October 13 | 166 days |
| UNION GROVE, WI US | 730 ft | May 11 | October 3 | 148 days |
| UW ARBORETUM - MADISON, WI US | 870 ft | May 7 | October 3 | 152 days |
| VIROQUA, WI US | 1,250 ft | May 13 | September 27 | 140 days |
| W BEND PUBLIC WORKS, WI US | 980 ft | May 7 | October 6 | 153 days |
| WASHINGTON IS, WI US | 690 ft | May 21 | October 7 | 143 days |
| WATERLOO WWTP, WI US | 800 ft | May 5 | October 4 | 154 days |
| WATERTOWN WWTP, WI US | 830 ft | May 3 | October 6 | 160 days |
| WAUKESHA WWTP, WI US | 790 ft | May 7 | October 7 | 155 days |
| WAUPACA, WI US | 840 ft | May 13 | September 30 | 144 days |
| WAUSAU DWTN AP, WI US | 1,180 ft | May 12 | September 29 | 142 days |
| WEST ALLIS, WI US | 720 ft | May 2 | October 16 | 169 days |
| WEST BEND, WI US | 940 ft | May 12 | October 5 | 148 days |
| WEYERHAEUSER 1N, WI US | 1,190 ft | May 16 | September 23 | 131 days |
| WHITEWATER, WI US | 880 ft | May 10 | October 3 | 148 days |
| WILLOW RSVR, WI US | 1,530 ft | May 19 | September 27 | 133 days |
| WINTER, WI US | 1,350 ft | May 26 | September 20 | 120 days |
| WISCONSIN DELLS, WI US | 830 ft | May 14 | September 29 | 139 days |
| WISCONSIN RAPIDS ALEXANDER FLD, WI US | 1,020 ft | May 15 | September 26 | 137 days |
| WISCONSIN RAPIDS, WI US | 1,030 ft | May 15 | September 24 | 135 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.
Related pages
- Planting calendar and frost dates by ZIP code
- Alabama frost dates and planting windows
- Arizona frost dates and planting windows
- Arkansas frost dates and planting windows
- California frost dates and planting windows
- Colorado frost dates and planting windows
- Connecticut frost dates and planting windows
- Delaware frost dates and planting windows
- Florida frost dates and planting windows
- Georgia frost dates and planting windows
- Idaho frost dates and planting windows
- Illinois frost dates and planting windows
- Indiana frost dates and planting windows
- Iowa frost dates and planting windows
- Kansas frost dates and planting windows
- Kentucky frost dates and planting windows
- Louisiana frost dates and planting windows
- Maine frost dates and planting windows
- Maryland frost dates and planting windows
- Massachusetts frost dates and planting windows
- Michigan frost dates and planting windows
- Minnesota frost dates and planting windows
- Mississippi frost dates and planting windows
- Missouri frost dates and planting windows
- Montana frost dates and planting windows
- Nebraska frost dates and planting windows
- Nevada frost dates and planting windows
- New Hampshire frost dates and planting windows
- New Jersey frost dates and planting windows
- New Mexico frost dates and planting windows
- New York frost dates and planting windows
- North Carolina frost dates and planting windows
- North Dakota frost dates and planting windows
- Ohio frost dates and planting windows
- Oklahoma frost dates and planting windows
- Oregon frost dates and planting windows
- Pennsylvania frost dates and planting windows
- Rhode Island frost dates and planting windows
- South Carolina frost dates and planting windows
- South Dakota frost dates and planting windows
- Tennessee frost dates and planting windows
- Texas frost dates and planting windows
- Utah frost dates and planting windows
- Vermont frost dates and planting windows
- Virginia frost dates and planting windows
- Washington frost dates and planting windows
- West Virginia frost dates and planting windows
- Wyoming frost dates and planting windows
- Methods and sources