Last frost date in Mountain Home, Idaho
May 2
Average last frost in spring. In an early year (1 in 10) it's over by April 18; in a late year (1 in 10) it comes after May 23.
October 8
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Mtn Home (USC00106174), 0.9 miles from Mountain Home, elevation 3,140 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 18 | May 2 | May 23 |
| First frost in fall | Sept 25 | Oct 8 | Oct 24 |
Frost-free days in an average year: 157
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 17 | Sept 28 |
| Frost (32°F) | Every year | May 2 | Oct 8 |
| Hard freeze (28°F) | Every year | Apr 18 | Oct 20 |
Nights at 32°F or colder in an average year: 139
What to plant now in Mountain Home
- Spring planting calendar for an average last frost around April 30 Mountain Home: May 2
- Fall planting calendar for an average first frost around October 10 Mountain Home: October 8
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
- Boise City 42 mi · last frost Apr 24
- Garden City 48 mi · last frost May 17
- Nampa 54 mi · last frost Apr 29
- Eagle 57 mi · last frost Apr 30
- Jerome 66 mi · last frost May 2
Updated