Last frost date in Richland, Washington
April 6
Average last frost in spring. In an early year (1 in 10) it's over by March 22; in a late year (1 in 10) it comes after April 24.
October 24
Average first frost in fall. 1 year in 10 it comes by October 10.
Source: NOAA U.S. Climate Normals 1991–2020, station Richland (USC00457015), 2.3 miles from Richland, elevation 373 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for West Richland, so its frost dates are the same as Richland's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 22 | Apr 6 | Apr 24 |
| First frost in fall | Oct 10 | Oct 24 | Nov 8 |
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 25 | Oct 14 |
| Frost (32°F) | Every year | Apr 6 | Oct 24 |
| Hard freeze (28°F) | Every year | Mar 18 | Nov 4 |
Nights at 32°F or colder in an average year: 91
What to plant now in Richland
- Spring planting calendar for an average last frost around April 10 Richland: April 6
- Fall planting calendar for an average first frost around October 20 Richland: October 24
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
- Kennewick 8 mi · last frost Mar 28
- Pasco 8 mi · last frost Apr 27
- Sunnyside 34 mi · last frost May 1
- Walla Walla 48 mi · last frost Mar 27
- Moses Lake 58 mi · last frost Apr 27
Updated