Frost dates · 16 cities · zones 4b–6a
Wisconsin frost dates, city by city
Median last spring frost across 16 Wisconsin cities runs from April 23 in La Crosse to May 8 in Eau Claire.
| City | Zone | Last frost median | First frost median | Season | Jan → Dec |
|---|---|---|---|---|---|
| Milwaukee | 6a | Apr 26 | Oct 18 | 173 d | |
| Madison | 5a | May 1 | Oct 9 | 161 d | |
| Green Bay | 5b | May 7 | Oct 9 | 154 d | |
| Kenosha | 5b | Apr 28 | Oct 19 | 174 d | |
| Racine | 6a | Apr 24 | Oct 24 | 180 d | |
| Appleton | 5b | May 4 | Oct 6 | 154 d | |
| Eau Claire | 4b | May 8 | Oct 4 | 149 d | |
| Waukesha | 5b | Apr 30 | Oct 14 | 164 d | |
| Oshkosh | 5b | Apr 24 | Oct 20 | 178 d | |
| Janesville | 5b | Apr 26 | Oct 15 | 170 d | |
| West Allis | 5b | Apr 26 | Oct 22 | 177 d | |
| La Crosse | 5a | Apr 23 | Oct 17 | 177 d | |
| Sheboygan | 6a | May 2 | Oct 21 | 169 d | |
| Wauwatosa | 5b | Apr 26 | Oct 18 | 173 d | |
| Fond du Lac | 5b | May 1 | Oct 12 | 162 d | |
| Brookfield | 5b | Apr 26 | Oct 18 | 173 d |
Medians from NOAA NCEI 1991–2020 U.S. Climate Normals at each city's nearest qualifying station; zones from the 2023 USDA Plant Hardiness Zone Map. Open a city for the 1-in-10-year dates, the station, and a planting calendar for every sauce crop.
All states →Build a plan from your ZIP →Earliest: La Crosse (Apr 23) · Latest: Eau Claire (May 8)