Frost dates in Madison County, Montana
The average last spring frost in Madison County falls Apr 30 to Jun 16 and the average first fall frost Sep 2 to Oct 10, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Alder, Big Sky, Ennis, Harrison, McAllister, Norris. 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 |
|---|---|---|---|---|
| 59710 | Alder | Jun 6 | Sep 14 | 5a |
| 59716 | Big Sky | Jun 16 | Sep 4 | 4b |
| 59720 | Jun 15 | Sep 10 | 5a | |
| 59729 | Ennis | Jun 16 | Sep 4 | 5a |
| 59735 | Harrison | Apr 30 | Oct 10 | 5a |
| 59740 | McAllister | Apr 30 | Oct 10 | 5a |
| 59745 | Norris | Apr 30 | Oct 10 | 5a |
| 59747 | Pony | Jun 8 | Sep 2 | 5a |
| 59749 | Sheridan | May 24 | Sep 22 | 5a |
| 59751 | Silver Star | Jun 8 | Sep 2 | 5a |
| 59754 | Twin Bridges | Jun 8 | Sep 2 | 5a |
| 59755 | Virginia City | Jun 4 | Sep 18 | 5a |
Nearby counties
Gallatin County Beaverhead County Jefferson County Silver Bow County Broadwater County Park County
All Montana counties · Download Montana frost dates (CSV)
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