Frost dates in Valley County, Montana
The average last spring frost in Valley County falls May 3 to Jun 5 and the average first fall frost Sep 2 to Oct 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 3b to 4a. Places: Frazer, Hinsdale, Nashua, Opheim, St. Marie. 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 |
|---|---|---|---|---|
| 59225 | Frazer | May 8 | Sep 28 | 4a |
| 59230 | St. Marie | May 3 | Oct 1 | 4a |
| 59231 | St. Marie | May 13 | Sep 27 | 4a |
| 59240 | Jun 5 | Sep 2 | 3b | |
| 59241 | Hinsdale | May 15 | Sep 26 | 3b |
| 59244 | Jun 5 | Sep 2 | 3b | |
| 59248 | Nashua | May 12 | Sep 24 | 4a |
| 59250 | Opheim | Jun 1 | Sep 7 | 3b |
| 59260 | Jun 5 | Sep 2 | 3b | |
| 59273 | May 15 | Sep 26 | 4a |
Nearby counties
Daniels County McCone County Phillips County Roosevelt County Sheridan County Garfield County
All Montana counties · Download Montana frost dates (CSV)
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