Last frost date in Lewiston, Idaho
April 6
Average last frost in spring. In an early year (1 in 10) it's over by March 20; in a late year (1 in 10) it comes after April 26.
October 26
Average first frost in fall. 1 year in 10 it comes by October 10.
Source: NOAA U.S. Climate Normals 1991–2020, station Lewiston Nez Perce Co AP (USW00024149), 1.7 miles from Lewiston, elevation 1,436 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 20 | Apr 6 | Apr 26 |
| First frost in fall | Oct 10 | Oct 26 | Nov 12 |
Frost-free days in an average year: 200
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 29 | Oct 13 |
| Frost (32°F) | Every year | Apr 6 | Oct 26 |
| Hard freeze (28°F) | Every year | Mar 15 | Nov 8 |
Nights at 32°F or colder in an average year: 80
What to plant now in Lewiston
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
- Spring planting calendar for an average last frost around April 10 Lewiston: April 6
- Fall planting calendar for an average first frost around October 30 Lewiston: October 26
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
- Moscow 23 mi · last frost Apr 29
- Coeur d'Alene 91 mi · last frost Apr 22
- Sandpoint 132 mi · last frost May 8
- Eagle 183 mi · last frost Apr 30
- Garden City 191 mi · last frost May 17
Updated