Last frost date in Twin Falls, Idaho
April 30
Average last frost in spring. In an early year (1 in 10) it's over by April 17; in a late year (1 in 10) it comes after May 14.
October 9
Average first frost in fall. 1 year in 10 it comes by September 24.
Source: NOAA U.S. Climate Normals 1991–2020, station Twin Falls-kmvt (USC00109293), 1.2 miles from Twin Falls, elevation 3,670 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 17 | Apr 30 | May 14 |
| First frost in fall | Sept 24 | Oct 9 | Oct 24 |
Frost-free days in an average year: 161
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 14 | Sept 28 |
| Frost (32°F) | Every year | Apr 30 | Oct 9 |
| Hard freeze (28°F) | Every year | Apr 17 | Oct 23 |
Nights at 32°F or colder in an average year: 140
What to plant now in Twin Falls
- Spring planting calendar for an average last frost around April 30 Twin Falls: April 30
- Fall planting calendar for an average first frost around October 10 Twin Falls: October 9
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
- Jerome 11 mi · last frost May 2
- Burley 34 mi · last frost May 7
- Mountain Home 74 mi · last frost May 2
- Pocatello 104 mi · last frost May 2
- Chubbuck 105 mi · last frost May 16
Updated