Frost dates in Iron County, Wisconsin
The average last spring frost in Iron County falls May 23 to May 26 and the average first fall frost Sep 21 to Oct 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 4b. Places: Hurley, Iron Belt, Mercer, Montreal, Saxon. 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 |
|---|---|---|---|---|
| 54525 | Montreal | May 24 | Sep 28 | 4b |
| 54534 | Hurley | May 24 | Sep 28 | 4a |
| 54536 | Iron Belt | May 24 | Sep 28 | 4a |
| 54547 | Mercer | May 25 | Sep 21 | 4a |
| 54550 | Montreal | May 24 | Sep 28 | 4a |
| 54559 | Saxon | May 23 | Oct 1 | 4b |
| 54565 | May 26 | Sep 27 | 4a |
Nearby counties
Ashland County Vilas County Bayfield County Price County Sawyer County Oneida County
All Wisconsin counties · Download Wisconsin frost dates (CSV)
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