Frost dates in Mineral County, Montana
The average last spring frost in Mineral County falls May 17 to Jun 10 and the average first fall frost Sep 23 to Sep 25, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b to 6a. Places: Cyr, De Borgia, Haugan, Riverbend, Saltese, St. Regis. 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 |
|---|---|---|---|---|
| 59820 | Cyr | May 18 | Sep 25 | 5b |
| 59830 | De Borgia | Jun 10 | Sep 23 | 6a |
| 59842 | Haugan | Jun 10 | Sep 23 | 6a |
| 59866 | St. Regis | May 17 | Sep 23 | 6a |
| 59867 | Saltese | Jun 10 | Sep 23 | 6a |
| 59872 | Riverbend | May 17 | Sep 23 | 6a |
Nearby counties
Sanders County Lake County Missoula County Flathead County Ravalli County Granite County
All Montana counties · Download Montana frost dates (CSV)
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