Frost dates in Washburn County, Wisconsin
The average last spring frost in Washburn County falls May 9 to May 22 and the average first fall frost Sep 23 to Oct 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a. Places: Birchwood, Minong, Shell Lake, Spooner, Springbrook, Trego. 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 |
|---|---|---|---|---|
| 54801 | Spooner | May 14 | Sep 28 | 4a |
| 54817 | Birchwood | May 9 | Sep 29 | 4a |
| 54859 | Minong | May 10 | Oct 4 | 4a |
| 54870 | May 14 | Sep 28 | 4a | |
| 54871 | Shell Lake | May 14 | Sep 28 | 4a |
| 54875 | Springbrook | May 22 | Sep 23 | 4a |
| 54888 | Trego | May 10 | Oct 4 | 4a |
Nearby counties
Burnett County Sawyer County Barron County Polk County Douglas County Rusk County
All Wisconsin counties · Download Wisconsin frost dates (CSV)
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