Frost dates in Flathead County, Montana
The average last spring frost in Flathead County falls May 1 to Jun 8 and the average first fall frost Sep 5 to Oct 15, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 6a. Places: Columbia Falls, Coram, Hungry Horse, Kalispell, Kila, Lakeside. 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 |
|---|---|---|---|---|
| 59901 | Kalispell | May 31 | Sep 10 | 5b |
| 59912 | Columbia Falls | May 16 | Sep 25 | 5a |
| 59913 | Coram | May 18 | Sep 20 | 5a |
| 59916 | Snowslip | May 9 | Oct 1 | 5a |
| 59919 | Hungry Horse | May 9 | Oct 1 | 5b |
| 59920 | Kila | May 12 | Sep 25 | 5b |
| 59922 | Lakeside | May 1 | Oct 15 | 6a |
| 59925 | Marion | May 31 | Sep 10 | 4b |
| 59926 | Martin City | May 9 | Oct 1 | 5b |
| 59927 | Olney | May 16 | Sep 18 | 5a |
| 59928 | Polebridge | May 18 | Sep 20 | 5a |
| 59932 | Somers | May 12 | Sep 25 | 6a |
| 59936 | West Glacier | Jun 8 | Sep 5 | 5a |
| 59937 | Whitefish | May 16 | Sep 25 | 5a |
Nearby counties
Lake County Lincoln County Glacier County Sanders County Mineral County Missoula County
All Montana counties · Download Montana frost dates (CSV)
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