Frost dates in Chouteau County, Montana
The average last spring frost in Chouteau County falls May 14 to May 24 and the average first fall frost Sep 19 to Sep 26, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 4b. Places: Big Sandy, Carter, Floweree, Fort Benton, Geraldine, Highwood. 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 |
|---|---|---|---|---|
| 59420 | Carter | May 23 | Sep 23 | 4a |
| 59440 | Floweree | May 23 | Sep 23 | 4b |
| 59442 | Fort Benton | May 15 | Sep 22 | 4a |
| 59446 | Geraldine | May 14 | Sep 26 | 4b |
| 59450 | Highwood | May 24 | Sep 21 | 4b |
| 59460 | Loma | May 20 | Sep 19 | 4a |
| 59520 | Big Sandy | May 17 | Sep 25 | 4a |
Nearby counties
Cascade County Hill County Judith Basin County Liberty County Teton County Fergus County
All Montana counties · Download Montana frost dates (CSV)
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