Last frost date in Washington, Missouri
April 8
Average last frost in spring. In an early year (1 in 10) it's over by March 24; in a late year (1 in 10) it comes after April 22.
October 25
Average first frost in fall. 1 year in 10 it comes by October 13.
Source: NOAA U.S. Climate Normals 1991–2020, station Washington (USC00238746), 2.3 miles from Washington, elevation 487 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 24 | Apr 8 | Apr 22 |
| First frost in fall | Oct 13 | Oct 25 | Nov 5 |
Frost-free days in an average year: 199
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 20 | Oct 16 |
| Frost (32°F) | Every year | Apr 8 | Oct 25 |
| Hard freeze (28°F) | Every year | Mar 29 | Nov 4 |
Nights at 32°F or colder in an average year: 116
What to plant now in Washington
- Spring planting calendar for an average last frost around April 10 Washington: April 8
- Fall planting calendar for an average first frost around October 20 Washington: October 25
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 Missouri
- Union 8 mi · last frost Apr 11
- Wildwood 19 mi · last frost Apr 12
- O'Fallon 23 mi · last frost Apr 10
- Chesterfield 25 mi · last frost Apr 4
- St. Peters 27 mi · last frost Apr 9
Updated