Frost dates in Powder River County, Montana
The average last spring frost in Powder River County falls May 14 to May 25 and the average first fall frost Sep 19 to Sep 28, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Ashland, Biddle, Broadus. 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 |
|---|---|---|---|---|
| 59003 | Ashland | May 25 | Sep 19 | 4b |
| 59062 | May 25 | Sep 19 | 5a | |
| 59314 | Biddle | May 14 | Sep 28 | 4b |
| 59316 | May 16 | Sep 28 | 4b | |
| 59317 | Broadus | May 16 | Sep 28 | 4b |
| 59343 | May 16 | Sep 28 | 4b | |
| 59351 | May 18 | Sep 22 | 4b |
Nearby counties
Carter County Custer County Rosebud County Fallon County Treasure County Big Horn County
All Montana counties · Download Montana 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.