Frost dates in Powell County, Montana
The average last spring frost in Powell County falls May 20 to Jun 9 and the average first fall frost Sep 8 to Sep 22, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Anaconda-Deer Lodge County, Avon, Elliston, Garrison, Goldcreek, Helmville. 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 |
|---|---|---|---|---|
| 59713 | Avon | Jun 9 | Sep 8 | 4b |
| 59722 | Anaconda-Deer Lodge County | Jun 1 | Sep 14 | 4b |
| 59728 | Elliston | Jun 9 | Sep 8 | 4b |
| 59731 | Garrison | Jun 9 | Sep 8 | 4b |
| 59733 | Goldcreek | Jun 9 | Sep 8 | 4b |
| 59843 | Helmville | Jun 9 | Sep 8 | 5a |
| 59854 | Ovando | May 20 | Sep 22 | 5a |
Nearby counties
Granite County Lewis and Clark County Deer Lodge County Jefferson County Silver Bow County Missoula County
All Montana counties · Download Montana frost dates (CSV)
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