Last frost date in Billings, Montana
May 4
Average last frost in spring. In an early year (1 in 10) it's over by April 20; in a late year (1 in 10) it comes after May 18.
October 7
Average first frost in fall. 1 year in 10 it comes by September 26.
Source: NOAA U.S. Climate Normals 1991–2020, station Billings Logan International AP (USW00024033), 1.4 miles from Billings, elevation 3,581 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 20 | May 4 | May 18 |
| First frost in fall | Sept 26 | Oct 7 | Oct 21 |
Frost-free days in an average year: 156
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 15 | Sept 28 |
| Frost (32°F) | Every year | May 4 | Oct 7 |
| Hard freeze (28°F) | Every year | Apr 21 | Oct 16 |
Nights at 32°F or colder in an average year: 142
What to plant now in Billings
- Spring planting calendar for an average last frost around April 30 Billings: May 4
- Fall planting calendar for an average first frost around October 10 Billings: October 7
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Montana
- Bozeman 121 mi · last frost May 26
- Belgrade 126 mi · last frost May 26
- Helena 175 mi · last frost May 9
- Great Falls 176 mi · last frost May 6
- Butte-Silver Bow (balance) 198 mi · last frost June 13