Frost Dates & Planting Calendars in Wisconsin
Typical last spring frost, first fall frost, and growing-season length for 96 cities in Wisconsin, based on NOAA 1991–2020 climate normals. Click a city for its full frost-date summary, monthly temperature chart, and 42-crop planting calendar.
| City | Last Spring Frost (typical) | First Fall Frost (typical) | Growing Season | USDA Zone |
|---|---|---|---|---|
| Milwaukee | April 26 | October 22 | 177 days | 6a |
| Madison | May 1 | October 9 | 161 days | 5a |
| Green Bay | May 7 | October 9 | 154 days | 5b |
| Kenosha | April 19 | October 26 | 189 days | 6a |
| Racine | April 20 | October 24 | 184 days | 6a |
| Appleton | May 4 | October 6 | 154 days | 5b |
| Waukesha | May 1 | October 13 | 162 days | 5b |
| Eau Claire | April 24 | October 14 | 170 days | 4b |
| Oshkosh | April 24 | October 20 | 178 days | 5b |
| Janesville | April 26 | October 15 | 170 days | 5b |
| West Allis | April 26 | October 22 | 177 days | 5b |
| La Crosse | April 27 | October 13 | 167 days | 5a |
| North La Crosse | April 23 | October 17 | 177 days | 5a |
| Sheboygan | April 25 | October 23 | 179 days | 6a |
| Wauwatosa | April 26 | October 18 | 173 days | 5b |
| Fond du Lac | April 27 | October 19 | 174 days | 5b |
| New Berlin | May 3 | October 14 | 162 days | 5b |
| Wausau | May 6 | October 4 | 150 days | 4b |
| Brookfield | April 30 | October 14 | 164 days | 5b |
| Greenfield | May 3 | October 14 | 162 days | 5b |
| Beloit | May 1 | October 12 | 162 days | 5b |
| Franklin | May 3 | October 14 | 162 days | 5b |
| Menomonee Falls | May 6 | October 8 | 154 days | 5b |
| Oak Creek | April 22 | October 26 | 184 days | 6a |
| Manitowoc | April 30 | October 20 | 171 days | 5b |
| Sun Prairie | May 1 | October 10 | 160 days | 5a |
| West Bend | May 1 | October 12 | 161 days | 5b |
| Fitchburg | May 1 | October 9 | 161 days | 5a |
| Stevens Point | May 4 | October 7 | 155 days | 5a |
| Superior | May 6 | October 9 | 154 days | 4b |
| Mount Pleasant | April 20 | October 24 | 184 days | 6a |
| Neenah | May 4 | October 6 | 154 days | 5b |
| Muskego | May 3 | October 14 | 162 days | 5b |
| De Pere | April 30 | October 9 | 161 days | 5b |
| Caledonia | April 24 | October 24 | 180 days | 5b |
| Watertown | April 28 | October 12 | 167 days | 5b |
| Mequon | May 6 | October 8 | 154 days | 5b |
| South Milwaukee | April 22 | October 26 | 184 days | 6a |
| Pleasant Prairie | April 28 | October 19 | 174 days | 5b |
| Germantown | May 6 | October 8 | 154 days | 5b |
| Howard | May 7 | October 9 | 154 days | 5b |
| Middleton | April 28 | October 15 | 169 days | 5a |
| Marshfield | May 5 | October 5 | 152 days | 4b |
| Onalaska | April 23 | October 17 | 177 days | 5a |
| Cudahy | April 19 | October 29 | 192 days | 6a |
| Wisconsin Rapids | May 9 | September 30 | 142 days | 4b |
| Menasha | May 4 | October 6 | 154 days | 5b |
| Ashwaubenon | April 30 | October 9 | 161 days | 5b |
| Beaver Dam | May 2 | October 9 | 157 days | 5a |
| Oconomowoc | April 30 | October 12 | 164 days | 5b |
| Menomonie | May 9 | October 1 | 143 days | 4b |
| Kaukauna | May 4 | October 6 | 154 days | 5b |
| Bellevue | May 6 | October 12 | 158 days | 5b |
| River Falls | May 11 | October 1 | 143 days | 4b |
| Weston | May 6 | October 4 | 150 days | 4b |
| Whitewater | May 2 | October 9 | 157 days | 5b |
| Hartford | May 8 | October 3 | 148 days | 5a |
| Greendale | May 3 | October 14 | 162 days | 5b |
| Whitefish Bay | April 26 | October 18 | 173 days | 6a |
| Chippewa Falls | May 8 | October 4 | 149 days | 4b |
| Allouez | April 30 | October 9 | 161 days | 5b |
| Hudson | April 22 | October 19 | 178 days | 4b |
| Shorewood | April 26 | October 18 | 173 days | 6a |
| Waunakee | May 1 | October 10 | 160 days | 5a |
| Stoughton | April 30 | October 11 | 163 days | 5b |
| Glendale | April 26 | October 18 | 173 days | 6a |
| Platteville | April 30 | October 13 | 166 days | 5a |
| Verona | April 28 | October 15 | 169 days | 5a |
| Fort Atkinson | April 28 | October 13 | 166 days | 5b |
| Plover | May 4 | October 7 | 155 days | 4b |
| Suamico | May 7 | October 9 | 154 days | 5b |
| Baraboo | May 5 | October 5 | 152 days | 5a |
| Brown Deer | April 26 | October 18 | 173 days | 6a |
| Port Washington | April 27 | October 22 | 176 days | 5b |
| Richfield | April 30 | October 16 | 167 days | 5b |
| Grafton | April 23 | October 24 | 182 days | 6a |
| Cedarburg | April 23 | October 24 | 182 days | 5b |
| Salem | April 30 | October 15 | 167 days | 5b |
| Waupun | May 1 | October 11 | 163 days | 5a |
| Two Rivers | April 27 | October 21 | 175 days | 5b |
| Little Chute | May 4 | October 6 | 154 days | 5b |
| Marinette | May 4 | October 11 | 160 days | 5b |
| Monroe | April 27 | October 14 | 170 days | 5a |
| Sussex | April 30 | October 16 | 167 days | 5b |
| Burlington | May 5 | October 9 | 156 days | 5b |
| Portage | April 28 | October 10 | 164 days | 5a |
| Oregon | May 1 | October 9 | 161 days | 5a |
| Elkhorn | April 28 | October 14 | 168 days | 5b |
| Sparta | May 9 | October 1 | 144 days | 4b |
| Holmen | April 23 | October 17 | 177 days | 5a |
| Reedsburg | May 2 | October 7 | 156 days | 5a |
| Somers | April 28 | October 19 | 174 days | 5b |
| Saint Francis | April 19 | October 29 | 192 days | 6a |
| Tomah | May 6 | October 3 | 148 days | 4b |
| Merrill | May 11 | September 30 | 139 days | 4b |
| Hartland | April 30 | October 12 | 164 days | 5b |