Frost dates in Sweetwater County, Wyoming
The average last spring frost in Sweetwater County falls May 21 to Jun 5 and the average first fall frost Sep 14 to Sep 29, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 5b. Places: Bairoil, Farson, Granger, Green River, Little America, McKinnon. 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 |
|---|---|---|---|---|
| 82322 | Bairoil | May 21 | Sep 27 | 5b |
| 82336 | Wamsutter | Jun 5 | Sep 14 | 4b |
| 82901 | Rock Springs | May 22 | Sep 28 | 5b |
| 82929 | Little America | May 25 | Sep 27 | 5a |
| 82932 | Farson | May 24 | Sep 24 | 4a |
| 82934 | Granger | May 25 | Sep 27 | 4b |
| 82935 | Green River | May 24 | Sep 22 | 5a |
| 82938 | McKinnon | May 22 | Sep 29 | 5b |
| 82942 | Point of Rocks | Jun 1 | Sep 16 | 5a |
| 82943 | Reliance | May 24 | Sep 24 | 5a |
| 82945 | Superior | May 22 | Sep 28 | 5a |
Nearby counties
Uinta County Sublette County Fremont County Lincoln County Carbon County Hot Springs County
All Wyoming counties · Download Wyoming 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.