Last frost date in Blackfoot, Idaho
May 5
Average last frost in spring. In an early year (1 in 10) it's over by April 23; in a late year (1 in 10) it comes after May 22.
October 3
Average first frost in fall. 1 year in 10 it comes by September 16.
Source: NOAA U.S. Climate Normals 1991–2020, station Blackfoot Fire Dept (USC00100915), 0.2 miles from Blackfoot, elevation 4,499 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 23 | May 5 | May 22 |
| First frost in fall | Sept 16 | Oct 3 | Oct 18 |
Frost-free days in an average year: 149
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 23 | Sept 21 |
| Frost (32°F) | Every year | May 5 | Oct 3 |
| Hard freeze (28°F) | Every year | Apr 22 | Oct 16 |
Nights at 32°F or colder in an average year: 162
What to plant now in Blackfoot
- Spring planting calendar for an average last frost around April 30 Blackfoot: May 5
- Fall planting calendar for an average first frost around September 30 Blackfoot: October 3
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 Idaho
- Chubbuck 19 mi · last frost May 16
- Pocatello 23 mi · last frost May 2
- Idaho Falls 26 mi · last frost May 9
- Rexburg 52 mi · last frost May 12
- Burley 86 mi · last frost May 7
Updated