Frost dates in Big Horn County, Wyoming
The average last spring frost in Big Horn County falls Apr 28 to May 16 and the average first fall frost Sep 23 to Oct 10, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Basin, Burlington, Byron, Cowley, Deaver, Frannie. 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 |
|---|---|---|---|---|
| 82410 | Basin | Apr 28 | Oct 10 | 4b |
| 82411 | Burlington | May 12 | Sep 28 | 5a |
| 82412 | Byron | May 6 | Oct 1 | 5a |
| 82420 | Cowley | May 9 | Sep 29 | 5a |
| 82421 | Deaver | May 6 | Oct 1 | 5a |
| 82422 | May 12 | Sep 28 | 5a | |
| 82423 | Frannie | May 6 | Oct 1 | 5a |
| 82426 | Greybull | May 11 | Sep 23 | 4b |
| 82428 | Hyattville | May 16 | Sep 24 | 5a |
| 82431 | Lovell | May 9 | Sep 29 | 5a |
| 82432 | Manderson | Apr 28 | Oct 10 | 4b |
| 82434 | May 12 | Sep 28 | 4b | |
| 82441 | Shell | May 16 | Sep 24 | 5a |
Nearby counties
Washakie County Hot Springs County Park County Sheridan County Johnson County Fremont 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.
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.