Frost dates in Washington County, Wisconsin
The average last spring frost in Washington County falls Apr 30 to May 8 and the average first fall frost Oct 3 to Oct 15, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Allenton, Germantown, Hartford, Jackson, Kewaskum, Richfield. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 53002 | Allenton | May 1 | Oct 12 | 5a |
| 53017 | Richfield | May 6 | Oct 8 | 5a |
| 53022 | Germantown | May 6 | Oct 8 | 5b |
| 53027 | Hartford | May 8 | Oct 3 | 5a |
| 53033 | Richfield | May 6 | Oct 8 | 5a |
| 53037 | Jackson | Apr 30 | Oct 15 | 5b |
| 53040 | Kewaskum | May 1 | Oct 12 | 5b |
| 53076 | Richfield | Apr 30 | Oct 15 | 5b |
| 53086 | Slinger | May 5 | Oct 5 | 5a |
| 53090 | West Bend | May 1 | Oct 12 | 5b |
| 53095 | West Bend | May 1 | Oct 12 | 5b |
Nearby counties
Ozaukee County Dodge County Waukesha County Milwaukee County Sheboygan County Fond du Lac County
All Wisconsin counties · Download Wisconsin frost dates (CSV)
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