Last frost date in Jerome, Idaho
May 2
Average last frost in spring. In an early year (1 in 10) it's over by April 15; in a late year (1 in 10) it comes after May 30.
October 14
Average first frost in fall. 1 year in 10 it comes by September 30.
Source: NOAA U.S. Climate Normals 1991–2020, station Jerome (USC00104670), 1 miles from Jerome, elevation 3,740 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 15 | May 2 | May 30 |
| First frost in fall | Sept 30 | Oct 14 | Oct 29 |
Frost-free days in an average year: 166
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 15 | Oct 3 |
| Frost (32°F) | Every year | May 2 | Oct 14 |
| Hard freeze (28°F) | Every year | Apr 14 | Oct 27 |
Nights at 32°F or colder in an average year: 153
What to plant now in Jerome
- Spring planting calendar for an average last frost around April 30 Jerome: May 2
- Fall planting calendar for an average first frost around October 10 Jerome: October 14
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
- Twin Falls 11 mi · last frost Apr 30
- Burley 39 mi · last frost May 7
- Mountain Home 66 mi · last frost May 2
- Pocatello 105 mi · last frost May 2
- Chubbuck 105 mi · last frost May 16
Updated