Last frost date in Ellensburg, Washington
May 8
Average last frost in spring. In an early year (1 in 10) it's over by April 25; in a late year (1 in 10) it comes after May 25.
October 2
Average first frost in fall. 1 year in 10 it comes by September 20.
Source: NOAA U.S. Climate Normals 1991–2020, station Ellensburg (USC00452505), 2.2 miles from Ellensburg, elevation 1,480 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 25 | May 8 | May 25 |
| First frost in fall | Sept 20 | Oct 2 | Oct 14 |
Frost-free days in an average year: 146
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 23 | Sept 21 |
| Frost (32°F) | Every year | May 8 | Oct 2 |
| Hard freeze (28°F) | Every year | Apr 23 | Oct 14 |
Nights at 32°F or colder in an average year: 155
What to plant now in Ellensburg
- Spring planting calendar for an average last frost around May 10 Ellensburg: May 8
- Fall planting calendar for an average first frost around September 30 Ellensburg: October 2
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
- Yakima 28 mi · last frost Apr 8
- Wenatchee 32 mi · last frost Apr 4
- Sunnyside 54 mi · last frost May 1
- Moses Lake 61 mi · last frost Apr 27
- Enumclaw 69 mi · last frost Apr 7
Updated