Frost dates in Teton County, Montana
The average last spring frost in Teton County falls May 13 to Jun 9 and the average first fall frost Sep 3 to Sep 27, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 4b. Places: Bynum, Dutton, Fairfield, New Rockport Colony, Power, Rockport Colony. 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 |
|---|---|---|---|---|
| 59419 | Bynum | Jun 9 | Sep 3 | 4b |
| 59422 | New Rockport Colony | Jun 9 | Sep 3 | 4b |
| 59433 | Dutton | May 20 | Sep 22 | 4a |
| 59436 | Fairfield | May 13 | Sep 27 | 4b |
| 59467 | Rockport Colony | Jun 9 | Sep 3 | 4b |
| 59468 | Power | Jun 2 | Sep 10 | 4b |
Nearby counties
Pondera County Cascade County Toole County Liberty County Chouteau County Lewis and Clark County
All Montana counties · Download Montana frost dates (CSV)
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