Frost dates in Fremont County, Idaho
The average last spring frost in Fremont County falls May 17 to Jun 15 and the average first fall frost Sep 10 to Sep 22, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 5a. Places: Island Park, Parker, St. Anthony, Warm River. 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 |
|---|---|---|---|---|
| 83420 | Warm River | May 21 | Sep 21 | 5a |
| 83421 | May 21 | Sep 21 | 5a | |
| 83429 | Island Park | Jun 15 | Sep 10 | 4a |
| 83433 | Island Park | Jun 15 | Sep 10 | 4a |
| 83438 | Parker | May 17 | Sep 22 | 5a |
| 83445 | St. Anthony | May 17 | Sep 22 | 5a |
Nearby counties
Madison County Teton County Clark County Jefferson County Bonneville County Bingham County
All Idaho counties · Download Idaho frost dates (CSV)
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