Last frost date in Pullman, Washington
May 6
Average last frost in spring. In an early year (1 in 10) it's over by April 22; in a late year (1 in 10) it comes after May 25.
September 29
Average first frost in fall. 1 year in 10 it comes by September 9.
Source: NOAA U.S. Climate Normals 1991–2020, station Pullman 2 NW (USC00456789), 2.1 miles from Pullman, elevation 2,515 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 22 | May 6 | May 25 |
| First frost in fall | Sept 9 | Sept 29 | Oct 15 |
Frost-free days in an average year: 143
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | June 1 | Sept 11 |
| Frost (32°F) | Every year | May 6 | Sept 29 |
| Hard freeze (28°F) | Every year | Apr 19 | Oct 12 |
Nights at 32°F or colder in an average year: 127
What to plant now in Pullman
- Spring planting calendar for an average last frost around May 10 Pullman: May 6
- Fall planting calendar for an average first frost around September 30 Pullman: September 29
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 Washington
- Cheney 56 mi · last frost May 30
- Spokane 66 mi · last frost Apr 26
- Airway Heights 66 mi · last frost Apr 26
- Walla Walla 72 mi · last frost Mar 27
- Pasco 98 mi · last frost Apr 27
Updated