Frost dates in Carbon County, Montana
The average last spring frost in Carbon County falls May 14 to Jun 5 and the average first fall frost Sep 14 to Sep 24, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a. Places: Bearcreek, Belfry, Boyd, Bridger, Edgar, Fromberg. 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 |
|---|---|---|---|---|
| 59007 | Bearcreek | Jun 3 | Sep 19 | 5a |
| 59008 | Belfry | May 18 | Sep 22 | 5a |
| 59013 | Boyd | May 29 | Sep 15 | 5a |
| 59014 | Bridger | May 14 | Sep 24 | 5a |
| 59026 | Edgar | May 29 | Sep 15 | 5a |
| 59029 | Fromberg | May 14 | Sep 24 | 5a |
| 59041 | Silesia | May 29 | Sep 15 | 5a |
| 59068 | Red Lodge | Jun 5 | Sep 14 | 5a |
| 59070 | Roberts | May 29 | Sep 15 | 5a |
| 59071 | Roscoe | Jun 5 | Sep 14 | 5a |
Nearby counties
Stillwater County Sweet Grass County Yellowstone County Park County Golden Valley County Big Horn County
All Montana counties · Download Montana frost dates (CSV)
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