Last frost dates in Wisconsin
204 NOAA weather stations in Wisconsin have thirty years of frost records. The median station sees its last 32 °F night around May 5; across the state that ranges from Apr 19 to Jun 3, so pick the station nearest you rather than a state-wide figure.
| Plan sowing from this date | ||||||
|---|---|---|---|---|---|---|
| KENOSHA | Apr 19 | May 3 | Apr 6 | Oct 26 | 189 | Plan sowing from this date → |
| MILWAUKEE MITCHELL AP | Apr 19 | May 2 | Apr 6 | Oct 29 | 192 | Plan sowing from this date → |
| RACINE | Apr 20 | May 6 | Apr 7 | Oct 24 | 184 | Plan sowing from this date → |
| GENOA DAM 8 | Apr 22 | May 5 | Apr 6 | Oct 17 | 178 | Plan sowing from this date → |
| SOUTH MILWAUKEE WWTP | Apr 22 | May 8 | Apr 9 | Oct 26 | 184 | Plan sowing from this date → |
| STEUBEN 4 SE | Apr 22 | May 8 | Apr 7 | Oct 20 | 179 | Plan sowing from this date → |
| GRAFTON WWTP | Apr 23 | May 9 | Apr 10 | Oct 24 | 182 | Plan sowing from this date → |
| LA CROSSE MUNI AP | Apr 23 | May 6 | Apr 9 | Oct 17 | 177 | Plan sowing from this date → |
| EAU CLAIRE 3SW | Apr 24 | May 7 | Apr 9 | Oct 14 | 170 | Plan sowing from this date → |
| LYNXVILLE DAM 9 | Apr 24 | May 8 | Apr 9 | Oct 17 | 175 | Plan sowing from this date → |
| OSHKOSH | Apr 24 | May 8 | Apr 10 | Oct 20 | 178 | Plan sowing from this date → |
| RACINE BATTEN AP | Apr 24 | May 10 | Apr 11 | Oct 24 | 180 | Plan sowing from this date → |
| ROCK SPRINGS 3 SW | Apr 24 | May 7 | Apr 10 | Oct 20 | 178 | Plan sowing from this date → |
| JEFFERSON WWTP | Apr 25 | May 9 | Apr 12 | Oct 18 | 173 | Plan sowing from this date → |
| LAKE GENEVA WWTP | Apr 25 | May 10 | Apr 10 | Oct 21 | 179 | Plan sowing from this date → |
| SHEBOYGAN | Apr 25 | May 11 | Apr 11 | Oct 23 | 179 | Plan sowing from this date → |
| AFTON - JANESVILLE WWTP | Apr 26 | May 11 | Apr 13 | Oct 15 | 170 | Plan sowing from this date → |
| MT MARY COLLEGE | Apr 26 | May 12 | Apr 12 | Oct 18 | 173 | Plan sowing from this date → |
| WEST ALLIS | Apr 26 | May 12 | Apr 12 | Oct 22 | 177 | Plan sowing from this date → |
| CASHTON | Apr 27 | May 11 | Apr 14 | Oct 14 | 170 | Plan sowing from this date → |
| FOND DU LAC 2 SW | Apr 27 | May 11 | Apr 13 | Oct 19 | 174 | Plan sowing from this date → |
| LA CROSSE WFO | Apr 27 | May 12 | Apr 12 | Oct 13 | 167 | Plan sowing from this date → |
| LANCASTER 4 WSW | Apr 27 | May 11 | Apr 11 | Oct 11 | 166 | Plan sowing from this date → |
| MONROE WWTP | Apr 27 | May 12 | Apr 12 | Oct 14 | 170 | Plan sowing from this date → |
| PORT WASHINGTON | Apr 27 | May 14 | Apr 11 | Oct 22 | 176 | Plan sowing from this date → |
| TWO RIVERS | Apr 27 | May 10 | Apr 14 | Oct 21 | 175 | Plan sowing from this date → |
| ALMA DAM 4 | Apr 28 | May 9 | Apr 13 | Oct 14 | 168 | Plan sowing from this date → |
| CHARMANY FARM | Apr 28 | May 11 | Apr 14 | Oct 15 | 169 | Plan sowing from this date → |
| DELAVAN WWTP | Apr 28 | May 14 | Apr 12 | Oct 14 | 168 | Plan sowing from this date → |
| FT ATKINSON | Apr 28 | May 17 | Apr 14 | Oct 13 | 166 | Plan sowing from this date → |
| HUSTISFORD WWTP | Apr 28 | May 13 | Apr 14 | Oct 10 | 164 | Plan sowing from this date → |
| KENOSHA RGNL AP | Apr 28 | May 13 | Apr 13 | Oct 19 | 174 | Plan sowing from this date → |
| PORTAGE WWTP | Apr 28 | May 12 | Apr 14 | Oct 10 | 164 | Plan sowing from this date → |
| PRAIRIE DU CHIEN | Apr 28 | May 11 | Apr 14 | Oct 12 | 166 | Plan sowing from this date → |
| WATERTOWN WWTP | Apr 28 | May 13 | Apr 14 | Oct 12 | 167 | Plan sowing from this date → |
| BRODHEAD WWTP | Apr 29 | May 14 | Apr 14 | Oct 12 | 165 | Plan sowing from this date → |
| LAKE MILLS WWTP | Apr 29 | May 13 | Apr 15 | Oct 14 | 167 | Plan sowing from this date → |
| TREMPEALEAU DAM 6 | Apr 29 | May 13 | Apr 11 | Oct 11 | 165 | Plan sowing from this date → |
| BROOKFIELD WWTP | Apr 30 | May 15 | Apr 16 | Oct 14 | 164 | Plan sowing from this date → |
| CLINTON WWTP | Apr 30 | May 17 | Apr 15 | Oct 10 | 161 | Plan sowing from this date → |
| GREEN BAY | Apr 30 | May 16 | Apr 16 | Oct 9 | 161 | Plan sowing from this date → |
| JACKSON | Apr 30 | May 15 | Apr 15 | Oct 15 | 167 | Plan sowing from this date → |
| LONE ROCK TRI CO AP | Apr 30 | May 14 | Apr 15 | Oct 9 | 161 | Plan sowing from this date → |
| MANITOWOC | Apr 30 | May 15 | Apr 14 | Oct 20 | 171 | Plan sowing from this date → |
| OCONOMOWOC WWTP | Apr 30 | May 17 | Apr 16 | Oct 12 | 164 | Plan sowing from this date → |
| OSHKOSH WITTMAN AP | Apr 30 | May 13 | Apr 15 | Oct 13 | 165 | Plan sowing from this date → |
| PADDOCK LAKE | Apr 30 | May 16 | Apr 15 | Oct 15 | 167 | Plan sowing from this date → |
| PELL LAKE | Apr 30 | May 16 | Apr 16 | Oct 13 | 164 | Plan sowing from this date → |
| PLATTEVILLE | Apr 30 | May 13 | Apr 14 | Oct 13 | 166 | Plan sowing from this date → |
| RICHFIELD 3 SSW | Apr 30 | May 16 | Apr 16 | Oct 16 | 167 | Plan sowing from this date → |
| STOUGHTON | Apr 30 | May 15 | Apr 16 | Oct 11 | 163 | Plan sowing from this date → |
| WATERLOO WWTP | Apr 30 | May 15 | Apr 16 | Oct 9 | 163 | Plan sowing from this date → |
| BELOIT | May 1 | May 16 | Apr 17 | Oct 12 | 162 | Plan sowing from this date → |
| BERLIN WWTP | May 1 | May 16 | Apr 19 | Oct 8 | 158 | Plan sowing from this date → |
| CHILTON | May 1 | May 17 | Apr 19 | Oct 14 | 162 | Plan sowing from this date → |
| DURAND | May 1 | May 15 | Apr 17 | Oct 10 | 162 | Plan sowing from this date → |
| FOND DU LAC CO AP | May 1 | May 17 | Apr 17 | Oct 10 | 160 | Plan sowing from this date → |
| FOND DU LAC WWTP | May 1 | May 17 | Apr 18 | Oct 12 | 162 | Plan sowing from this date → |
| GREEN BAY WFO | May 1 | May 16 | Apr 19 | Oct 11 | 160 | Plan sowing from this date → |
| HORICON WWTP | May 1 | May 19 | Apr 16 | Oct 10 | 158 | Plan sowing from this date → |
| JIM FALLS 3NW | May 1 | May 16 | Apr 17 | Oct 8 | 158 | Plan sowing from this date → |
| KEWAUNEE | May 1 | May 17 | Apr 16 | Oct 18 | 168 | Plan sowing from this date → |
| LODI | May 1 | May 15 | Apr 17 | Oct 10 | 162 | Plan sowing from this date → |
| MADISON DANE RGNL AP | May 1 | May 16 | Apr 16 | Oct 10 | 160 | Plan sowing from this date → |
| NECEDAH 5 WNW | May 1 | May 14 | Apr 17 | Oct 3 | 157 | Plan sowing from this date → |
| RIPON 5 NE | May 1 | May 14 | Apr 16 | Oct 11 | 163 | Plan sowing from this date → |
| TOWN OF WESTFORD | May 1 | May 16 | Apr 16 | Oct 11 | 163 | Plan sowing from this date → |
| UW ARBORETUM - MADISON | May 1 | May 17 | Apr 18 | Oct 9 | 161 | Plan sowing from this date → |
| W BEND PUBLIC WORKS | May 1 | May 18 | Apr 19 | Oct 12 | 161 | Plan sowing from this date → |
| WAUKESHA WWTP | May 1 | May 18 | Apr 18 | Oct 13 | 162 | Plan sowing from this date → |
| BEAVER DAM WWTP | May 2 | May 16 | Apr 19 | Oct 9 | 157 | Plan sowing from this date → |
| MAUSTON 1 SE | May 2 | May 15 | Apr 19 | Oct 7 | 158 | Plan sowing from this date → |
| REEDSBURG | May 2 | May 16 | Apr 18 | Oct 7 | 156 | Plan sowing from this date → |
| SHEBOYGAN WWTP | May 2 | May 19 | Apr 17 | Oct 21 | 169 | Plan sowing from this date → |
| WHITEWATER | May 2 | May 20 | Apr 18 | Oct 9 | 157 | Plan sowing from this date → |
| BOSCOBEL AP | May 3 | May 18 | Apr 19 | Oct 7 | 155 | Plan sowing from this date → |
| DARLINGTON WWTP | May 3 | May 19 | Apr 19 | Oct 4 | 153 | Plan sowing from this date → |
| DODGEVILLE WWTP | May 3 | May 17 | Apr 19 | Oct 7 | 157 | Plan sowing from this date → |
| GAYS MILLS | May 3 | May 18 | Apr 19 | Oct 7 | 156 | Plan sowing from this date → |
| HALES CORNERS/WHITNALL PARK/BO | May 3 | May 19 | Apr 18 | Oct 14 | 162 | Plan sowing from this date → |
| HINGHAM WWTP | May 3 | May 18 | Apr 18 | Oct 16 | 165 | Plan sowing from this date → |
| MONTELLO | May 3 | May 18 | Apr 21 | Oct 5 | 153 | Plan sowing from this date → |
| PLYMOUTH WWTP | May 3 | May 20 | Apr 19 | Oct 10 | 159 | Plan sowing from this date → |
| SULLIVAN 3SE | May 3 | May 21 | Apr 18 | Oct 9 | 157 | Plan sowing from this date → |
| APPLETON | May 4 | May 20 | Apr 21 | Oct 6 | 154 | Plan sowing from this date → |
| ARLINGTON | May 4 | May 18 | Apr 20 | Oct 6 | 154 | Plan sowing from this date → |
| CLINTONVILLE | May 4 | May 19 | Apr 22 | Oct 6 | 154 | Plan sowing from this date → |
| MARINETTE | May 4 | May 20 | Apr 19 | Oct 11 | 160 | Plan sowing from this date → |
| NEW LONDON | May 4 | May 19 | Apr 21 | Oct 6 | 153 | Plan sowing from this date → |
| SAUK CITY WWTP | May 4 | May 18 | Apr 20 | Oct 6 | 155 | Plan sowing from this date → |
| ST CROIX FALLS | May 4 | May 18 | Apr 20 | Oct 8 | 156 | Plan sowing from this date → |
| STEVENS PT | May 4 | May 20 | Apr 22 | Oct 7 | 155 | Plan sowing from this date → |
| WEST BEND | May 4 | May 21 | Apr 20 | Oct 11 | 157 | Plan sowing from this date → |
| AMERY | May 5 | May 21 | Apr 20 | Oct 4 | 151 | Plan sowing from this date → |
| BARABOO | May 5 | May 21 | Apr 21 | Oct 5 | 152 | Plan sowing from this date → |
| BELGIUM WWTP | May 5 | May 22 | Apr 20 | Oct 12 | 159 | Plan sowing from this date → |
| BLOOMER | May 5 | May 19 | Apr 23 | Oct 3 | 151 | Plan sowing from this date → |
| BURLINGTON | May 5 | May 23 | Apr 21 | Oct 9 | 156 | Plan sowing from this date → |
| CUMBERLAND | May 5 | May 18 | Apr 22 | Oct 4 | 152 | Plan sowing from this date → |
| DODGE | May 5 | May 19 | Apr 21 | Oct 5 | 152 | Plan sowing from this date → |
| HILLSBORO | May 5 | May 18 | Apr 22 | Oct 4 | 153 | Plan sowing from this date → |
| HOLCOMBE | May 5 | May 21 | Apr 21 | Oct 2 | 149 | Plan sowing from this date → |
| MARSHFIELD EXP FARM | May 5 | May 20 | Apr 22 | Oct 5 | 150 | Plan sowing from this date → |
| MARSHFIELD MUNI AP | May 5 | May 20 | Apr 22 | Oct 5 | 152 | Plan sowing from this date → |
| RICHLAND CTR | May 5 | May 19 | Apr 21 | Oct 6 | 154 | Plan sowing from this date → |
| ROCHESTER WWTP | May 5 | May 23 | Apr 23 | Oct 10 | 156 | Plan sowing from this date → |
| SAUKVILLE WWTP | May 5 | May 19 | Apr 22 | Oct 11 | 158 | Plan sowing from this date → |
| SHEBOYGAN CO MEM AP | May 5 | May 21 | Apr 22 | Oct 8 | 154 | Plan sowing from this date → |
| SLINGER WWTP | May 5 | May 20 | Apr 21 | Oct 5 | 152 | Plan sowing from this date → |
| UNION GROVE | May 5 | May 20 | Apr 21 | Oct 8 | 156 | Plan sowing from this date → |
| BALDWIN | May 6 | May 21 | Apr 21 | Oct 2 | 148 | Plan sowing from this date → |
| BRILLION | May 6 | May 21 | Apr 22 | Oct 6 | 151 | Plan sowing from this date → |
| CASHTON 3NNW | May 6 | May 20 | Apr 22 | Oct 3 | 150 | Plan sowing from this date → |
| DALTON | May 6 | May 22 | Apr 22 | Oct 2 | 150 | Plan sowing from this date → |
| DENMARK WWTP | May 6 | May 20 | Apr 22 | Oct 12 | 158 | Plan sowing from this date → |
| FORESTVILLE-4E | May 6 | May 20 | Apr 22 | Oct 17 | 163 | Plan sowing from this date → |
| GERMANTOWN | May 6 | May 25 | Apr 22 | Oct 8 | 154 | Plan sowing from this date → |
| LUCK | May 6 | May 20 | Apr 23 | Oct 4 | 149 | Plan sowing from this date → |
| MATHER 3 NW | May 6 | May 20 | Apr 24 | Oct 3 | 148 | Plan sowing from this date → |
| ROSHOLT 9 NNE | May 6 | May 21 | Apr 24 | Oct 5 | 150 | Plan sowing from this date → |
| SUPERIOR | May 6 | May 25 | Apr 24 | Oct 9 | 154 | Plan sowing from this date → |
| WAUSAU DWTN AP | May 6 | May 21 | Apr 24 | Oct 4 | 150 | Plan sowing from this date → |
| AUGUSTA RS | May 7 | May 20 | Apr 23 | Oct 1 | 146 | Plan sowing from this date → |
| BIG FALLS HYDRO | May 7 | May 22 | Apr 25 | Oct 3 | 147 | Plan sowing from this date → |
| GREEN BAY BOTANICAL | May 7 | May 22 | Apr 24 | Oct 9 | 154 | Plan sowing from this date → |
| MAZOMANIE WWTP | May 7 | May 22 | Apr 22 | Oct 1 | 148 | Plan sowing from this date → |
| STANLEY WWTP | May 7 | May 21 | Apr 24 | Oct 3 | 147 | Plan sowing from this date → |
| VIROQUA | May 7 | May 21 | Apr 23 | Oct 2 | 148 | Plan sowing from this date → |
| EAU CLAIRE RGNL AP | May 8 | May 21 | Apr 24 | Oct 4 | 149 | Plan sowing from this date → |
| HARTFORD WWTP | May 8 | May 24 | Apr 24 | Oct 3 | 148 | Plan sowing from this date → |
| MARKESAN | May 8 | May 23 | Apr 25 | Oct 2 | 144 | Plan sowing from this date → |
| RICE LAKE | May 8 | May 23 | Apr 25 | Oct 2 | 145 | Plan sowing from this date → |
| STURGEON BAY EXP FARM | May 8 | May 21 | Apr 25 | Oct 13 | 157 | Plan sowing from this date → |
| WAUPACA | May 8 | May 21 | Apr 24 | Oct 6 | 151 | Plan sowing from this date → |
| WISCONSIN DELLS | May 8 | May 22 | Apr 24 | Oct 3 | 146 | Plan sowing from this date → |
| WISCONSIN RAPIDS ALEXANDER FLD | May 8 | May 22 | Apr 26 | Oct 1 | 145 | Plan sowing from this date → |
| BLAIR | May 9 | May 23 | Apr 28 | Oct 1 | 143 | Plan sowing from this date → |
| FRIENDSHIP | May 9 | May 23 | Apr 23 | Oct 3 | 147 | Plan sowing from this date → |
| MENOMONIE | May 9 | May 24 | Apr 27 | Oct 1 | 143 | Plan sowing from this date → |
| OCONTO 4 W | May 9 | May 23 | Apr 25 | Oct 6 | 150 | Plan sowing from this date → |
| SHAWANO 2SSW | May 9 | May 24 | Apr 26 | Oct 2 | 144 | Plan sowing from this date → |
| SPARTA | May 9 | May 22 | Apr 26 | Oct 1 | 144 | Plan sowing from this date → |
| WEYERHAEUSER 1N | May 9 | May 27 | Apr 26 | Sep 29 | 140 | Plan sowing from this date → |
| WISCONSIN RAPIDS | May 9 | May 24 | Apr 26 | Sep 30 | 142 | Plan sowing from this date → |
| HANCOCK EXP FARM | May 10 | May 24 | Apr 25 | Oct 3 | 146 | Plan sowing from this date → |
| MINONG 5 WSW | May 10 | May 26 | Apr 29 | Oct 4 | 144 | Plan sowing from this date → |
| MONDOVI | May 10 | May 25 | Apr 27 | Oct 2 | 144 | Plan sowing from this date → |
| NEILLSVILLE 3ESE | May 10 | May 25 | Apr 26 | Oct 1 | 144 | Plan sowing from this date → |
| RICE RSVR TOMAHAWK-2 | May 10 | May 27 | Apr 28 | Oct 4 | 146 | Plan sowing from this date → |
| RIDGELAND 1NNE | May 10 | May 26 | Apr 28 | Sep 29 | 140 | Plan sowing from this date → |
| DANBURY | May 11 | May 28 | Apr 28 | Sep 30 | 138 | Plan sowing from this date → |
| GRANTSBURG | May 11 | May 28 | Apr 27 | Oct 1 | 141 | Plan sowing from this date → |
| MEDFORD | May 11 | May 26 | Apr 29 | Oct 1 | 141 | Plan sowing from this date → |
| MERRILL | May 11 | May 27 | Apr 29 | Sep 30 | 139 | Plan sowing from this date → |
| PESHTIGO | May 11 | May 26 | Apr 29 | Oct 5 | 145 | Plan sowing from this date → |
| RIVER FALLS | May 11 | May 26 | Apr 26 | Oct 1 | 143 | Plan sowing from this date → |
| HILLSBORO 2SW | May 12 | May 26 | Apr 28 | Sep 29 | 138 | Plan sowing from this date → |
| SOLON SPRINGS | May 12 | May 27 | Apr 28 | Oct 2 | 142 | Plan sowing from this date → |
| ELLSWORTH 1E | May 13 | May 27 | Apr 29 | Sep 29 | 139 | Plan sowing from this date → |
| OWEN 1E | May 13 | May 29 | Apr 29 | Sep 26 | 136 | Plan sowing from this date → |
| STOCKBRIDGE-MUNSEE RSVN | May 13 | May 26 | Apr 29 | Sep 30 | 141 | Plan sowing from this date → |
| WILLOW RSVR | May 13 | May 27 | Apr 29 | Oct 3 | 141 | Plan sowing from this date → |
| ANTIGO | May 14 | May 28 | Apr 30 | Sep 30 | 139 | Plan sowing from this date → |
| EPHRAIM 1NE-WWTP | May 14 | May 28 | Apr 28 | Oct 18 | 155 | Plan sowing from this date → |
| SPOONER AG RES STN | May 14 | May 29 | Apr 30 | Sep 28 | 135 | Plan sowing from this date → |
| SURING | May 14 | May 29 | Apr 30 | Oct 1 | 139 | Plan sowing from this date → |
| PARK FALLS DNR HQ | May 15 | May 30 | Apr 30 | Sep 28 | 134 | Plan sowing from this date → |
| WASHINGTON IS | May 15 | May 31 | Apr 30 | Oct 14 | 152 | Plan sowing from this date → |
| CLAM LAKE 4W | May 16 | May 27 | May 1 | Sep 30 | 136 | Plan sowing from this date → |
| NECEDAH | May 17 | Jun 1 | May 2 | Sep 25 | 131 | Plan sowing from this date → |
| PATTISON RANGER STAION | May 18 | Jun 3 | May 4 | Oct 3 | 135 | Plan sowing from this date → |
| LAONA 6 SW | May 19 | Jun 2 | May 5 | Sep 29 | 131 | Plan sowing from this date → |
| ST GERMAIN | May 19 | May 31 | May 5 | Oct 3 | 136 | Plan sowing from this date → |
| WINTER | May 19 | Jun 3 | May 3 | Sep 27 | 129 | Plan sowing from this date → |
| ASHLAND 3S | May 20 | Jun 3 | May 3 | Oct 2 | 133 | Plan sowing from this date → |
| BAYFIELD 6 N | May 20 | Jun 5 | May 2 | Oct 8 | 141 | Plan sowing from this date → |
| DRUMMOND | May 20 | Jun 2 | May 5 | Oct 1 | 132 | Plan sowing from this date → |
| JUMP RVR 3E | May 20 | Jun 4 | May 3 | Sep 23 | 125 | Plan sowing from this date → |
| MADELINE ISLAND | May 20 | Jun 3 | May 5 | Oct 9 | 140 | Plan sowing from this date → |
| BUTTERNUT 3SW | May 22 | Jun 4 | May 6 | Sep 24 | 126 | Plan sowing from this date → |
| GORDON | May 22 | Jun 4 | May 6 | Sep 26 | 126 | Plan sowing from this date → |
| HAYWARD RS | May 22 | Jun 6 | May 2 | Sep 23 | 124 | Plan sowing from this date → |
| LAKEWOOD 3 NE | May 22 | Jun 3 | May 7 | Sep 28 | 129 | Plan sowing from this date → |
| RHINELANDER | May 22 | Jun 4 | May 6 | Sep 24 | 125 | Plan sowing from this date → |
| ASHLAND KENNEDY MEM AP | May 23 | Jun 6 | May 8 | Sep 29 | 125 | Plan sowing from this date → |
| BAYFIELD FISH HATCHERY | May 23 | Jun 5 | May 8 | Oct 2 | 131 | Plan sowing from this date → |
| HAYWARD MUNI AP | May 23 | Jun 6 | May 5 | Sep 22 | 122 | Plan sowing from this date → |
| MINOCQUA | May 23 | Jun 6 | May 7 | Sep 27 | 127 | Plan sowing from this date → |
| PRENTICE #2 | May 23 | Jun 6 | May 6 | Sep 23 | 124 | Plan sowing from this date → |
| RHINELANDER 4NE | May 23 | Jun 5 | May 7 | Sep 23 | 124 | Plan sowing from this date → |
| SAXON 1WSW | May 23 | Jun 5 | May 4 | Oct 1 | 132 | Plan sowing from this date → |
| BRULE RS | May 24 | Jun 6 | May 8 | Sep 26 | 124 | Plan sowing from this date → |
| FLORENCE | May 24 | Jun 8 | May 9 | Sep 25 | 121 | Plan sowing from this date → |
| GOODMAN SANITARY DIST | May 24 | Jun 7 | May 10 | Sep 30 | 128 | Plan sowing from this date → |
| HURLEY | May 24 | Jun 7 | May 4 | Sep 28 | 128 | Plan sowing from this date → |
| EAGLE RVR | May 25 | Jun 6 | May 10 | Sep 24 | 121 | Plan sowing from this date → |
| REST LAKE | May 25 | Jun 9 | May 8 | Sep 21 | 117 | Plan sowing from this date → |
| CRIVITZ HIGH FALLS | May 26 | Jun 11 | May 11 | Sep 22 | 118 | Plan sowing from this date → |
| MELLEN 4 NE | May 26 | Jun 9 | May 8 | Sep 27 | 125 | Plan sowing from this date → |
| RHINELANDER ONEIDA AP | May 26 | Jun 8 | May 9 | Sep 23 | 120 | Plan sowing from this date → |
| LADYSMITH 3W | May 27 | Jun 8 | May 14 | Sep 22 | 117 | Plan sowing from this date → |
| PORT WING | May 31 | Jun 13 | May 16 | Oct 2 | 123 | Plan sowing from this date → |
| FOXBORO | Jun 1 | Jun 14 | May 18 | Sep 22 | 113 | Plan sowing from this date → |
| NORTH PELICAN | Jun 3 | Jun 27 | May 20 | Sep 18 | 106 | Plan sowing from this date → |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to transplant tomatoes and peppers, both killed by a single frost. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.