Frost dates in Yellowstone County, Montana
The average last spring frost in Yellowstone County falls May 4 to May 22 and the average first fall frost Sep 15 to Oct 7, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b to 5a. Places: Acton, Ballantine, Billings, Custer, Huntley, Laurel. 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 |
|---|---|---|---|---|
| 59002 | Acton | May 4 | Oct 7 | 5a |
| 59006 | Ballantine | May 12 | Sep 25 | 4b |
| 59015 | Mountain View Colony | May 22 | Sep 15 | 4b |
| 59024 | Custer | May 22 | Sep 22 | 4b |
| 59037 | Huntley | May 12 | Sep 25 | 4b |
| 59044 | Laurel | May 5 | Oct 3 | 5a |
| 59079 | Shepherd | May 12 | Sep 25 | 4b |
| 59088 | Worden | May 22 | Sep 22 | 4b |
| 59101 | Lockwood | May 10 | Oct 1 | 5a |
| 59102 | Billings | May 5 | Oct 3 | 5a |
| 59105 | Billings | May 4 | Oct 7 | 5a |
| 59106 | Billings | May 5 | Oct 3 | 5a |
Nearby counties
Musselshell County Golden Valley County Stillwater County Big Horn County Carbon County Treasure County
All Montana counties · Download Montana frost dates (CSV)
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