Wisconsin planting zones & frost dates
USDA hardiness zones in Wisconsin go from 4b to 6a. Pick your city for its average frost dates and a planting calendar, or search by ZIP code.
| City | Zone | Avg. last frost | Avg. first frost |
|---|---|---|---|
| Allouez | 5b | Apr 30 | Oct 9 |
| Appleton | 5b | May 4 | Oct 6 |
| Ashwaubenon | 5b | Apr 30 | Oct 9 |
| Baraboo | 5a | May 5 | Oct 5 |
| Beaver Dam | 5a | May 2 | Oct 9 |
| Bellevue | 5b | May 6 | Oct 12 |
| Beloit | 5b | May 1 | Oct 12 |
| Brookfield | 5b | Apr 30 | Oct 14 |
| Brown Deer | 6a | Apr 26 | Oct 18 |
| Burlington | 5b | May 5 | Oct 9 |
| Caledonia | 5b | Apr 24 | Oct 24 |
| Cedarburg | 5b | Apr 23 | Oct 24 |
| Chippewa Falls | 4b | May 8 | Oct 4 |
| Cudahy | 6a | Apr 19 | Oct 29 |
| De Pere | 5b | Apr 30 | Oct 9 |
| Eau Claire | 4b | Apr 24 | Oct 14 |
| Fitchburg | 5b | May 1 | Oct 9 |
| Fond du Lac | 5b | Apr 27 | Oct 19 |
| Fort Atkinson | 5b | Apr 28 | Oct 13 |
| Franklin | 5b | May 3 | Oct 14 |
| Germantown | 5b | May 6 | Oct 8 |
| Glendale | 6a | Apr 26 | Oct 18 |
| Grafton | 6a | Apr 23 | Oct 24 |
| Green Bay | 5b | May 7 | Oct 9 |
| Greendale | 5b | May 3 | Oct 14 |
| Greenfield | 5b | May 3 | Oct 14 |
| Hartford | 5a | May 8 | Oct 3 |
| Howard | 5b | May 7 | Oct 9 |
| Hudson | 5a | Apr 22 | Oct 19 |
| Janesville | 5b | Apr 26 | Oct 15 |
| Kaukauna | 5b | May 4 | Oct 6 |
| Kenosha | 6a | Apr 19 | Oct 26 |
| La Crosse | 5a | Apr 27 | Oct 13 |
| Little Chute | 5b | May 4 | Oct 6 |
| Madison | 5a | May 1 | Oct 9 |
| Manitowoc | 5b | Apr 30 | Oct 20 |
| Marinette | 5b | May 4 | Oct 11 |
| Marshfield | 4b | May 5 | Oct 5 |
| Menasha | 5b | May 4 | Oct 6 |
| Menomonee Falls | 5b | May 6 | Oct 8 |
| Menomonie | 4b | May 9 | Oct 1 |
| Mequon | 5b | May 6 | Oct 8 |
| Middleton | 5b | Apr 28 | Oct 15 |
| Milwaukee | 6a | Apr 26 | Oct 22 |
| Monroe | 5a | Apr 27 | Oct 14 |
| Mount Pleasant | 6a | Apr 20 | Oct 24 |
| Muskego | 5b | May 3 | Oct 14 |
| Neenah | 5b | May 4 | Oct 6 |
| New Berlin | 5b | May 3 | Oct 14 |
| North La Crosse | 5a | Apr 23 | Oct 17 |
| Oak Creek | 6a | Apr 22 | Oct 26 |
| Oconomowoc | 5b | Apr 30 | Oct 12 |
| Onalaska | 5a | Apr 23 | Oct 17 |
| Oregon | 5a | May 1 | Oct 9 |
| Oshkosh | 5b | Apr 24 | Oct 20 |
| Platteville | 5a | Apr 30 | Oct 13 |
| Pleasant Prairie | 5b | Apr 28 | Oct 19 |
| Plover | 4b | May 4 | Oct 7 |
| Port Washington | 5b | Apr 27 | Oct 22 |
| Portage | 5a | Apr 28 | Oct 10 |
| Racine | 6a | Apr 20 | Oct 24 |
| Richfield | 5b | Apr 30 | Oct 16 |
| River Falls | 4b | May 11 | Oct 1 |
| Salem | 5b | Apr 30 | Oct 15 |
| Sheboygan | 6a | Apr 25 | Oct 23 |
| Shorewood | 6a | Apr 26 | Oct 18 |
| South Milwaukee | 6a | Apr 22 | Oct 26 |
| Stevens Point | 5a | May 4 | Oct 7 |
| Stoughton | 5b | Apr 30 | Oct 11 |
| Suamico | 5b | May 7 | Oct 9 |
| Sun Prairie | 5a | May 1 | Oct 10 |
| Superior | 5a | May 6 | Oct 9 |
| Sussex | 5b | Apr 30 | Oct 16 |
| Two Rivers | 5b | Apr 27 | Oct 21 |
| Verona | 5a | Apr 28 | Oct 15 |
| Watertown | 5b | Apr 28 | Oct 12 |
| Waukesha | 5b | May 1 | Oct 13 |
| Waunakee | 5a | May 1 | Oct 10 |
| Waupun | 5a | May 1 | Oct 11 |
| Wausau | 4b | May 6 | Oct 4 |
| Wauwatosa | 5b | Apr 26 | Oct 18 |
| West Allis | 5b | Apr 26 | Oct 22 |
| West Bend | 5b | May 1 | Oct 12 |
| Weston | 4b | May 6 | Oct 4 |
| Whitefish Bay | 6a | Apr 26 | Oct 18 |
| Whitewater | 5b | May 2 | Oct 9 |
| Wisconsin Rapids | 4b | May 9 | Sep 30 |
Cities with 10,000+ residents. Data: USDA Plant Hardiness Zone Map 2023 and NOAA Climate Normals 1991–2020. Sources and method.