Frost dates in Washington County, Idaho
The average last spring frost in Washington County falls Apr 2 to May 15 and the average first fall frost Sep 27 to Nov 5, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 6a to 7a. Places: Cambridge, Midvale, Weiser. 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 |
|---|---|---|---|---|
| 83610 | Cambridge | Apr 2 | Nov 5 | 7a |
| 83645 | Midvale | May 15 | Sep 27 | 6a |
| 83672 | Weiser | Apr 23 | Oct 13 | 7a |
Nearby counties
Adams County Payette County Gem County Boise County Canyon County Ada 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.