Frost dates in Boundary County, Idaho
The average last spring frost in Boundary County falls Apr 30 to May 4 and the average first fall frost Sep 30 to Oct 4, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6a to 6b. Places: Bonners Ferry, Moyie Springs. 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 |
|---|---|---|---|---|
| 83805 | Bonners Ferry | May 4 | Sep 30 | 6a |
| 83826 | May 4 | Sep 30 | 6a | |
| 83845 | Moyie Springs | Apr 30 | Oct 4 | 6b |
| 83847 | Apr 30 | Oct 4 | 6b |
Nearby counties
Bonner County Kootenai County Shoshone County Benewah County Latah County Clearwater County
All Idaho counties · Download Idaho frost dates (CSV)
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