Frost dates in Caribou County, Idaho
The average last spring frost in Caribou County falls May 21 to May 29 and the average first fall frost Sep 17 to Sep 21, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 5b. Places: Bancroft, Grace, Soda 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 |
|---|---|---|---|---|
| 83217 | Bancroft | May 21 | Sep 21 | 5a |
| 83241 | Grace | May 29 | Sep 17 | 5b |
| 83276 | Soda Springs | May 29 | Sep 17 | 5a |
Nearby counties
Bannock County Bear Lake County Franklin County Bonneville County Oneida County Bingham County
All Idaho counties · Download Idaho frost dates (CSV)
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.