Last frost date in St. Louis, Missouri
April 1
Average last frost in spring. In an early year (1 in 10) it's over by March 14; in a late year (1 in 10) it comes after April 18.
November 4
Average first frost in fall. 1 year in 10 it comes by October 24.
Source: NOAA U.S. Climate Normals 1991–2020, station St Louis Sci Ctr (USC00237452), 1.5 miles from St. Louis, elevation 515 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Clayton, Crestwood, Kirkwood, University City and Webster Groves, so their frost dates are the same as St. Louis's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 14 | Apr 1 | Apr 18 |
| First frost in fall | Oct 24 | Nov 4 | Nov 21 |
Frost-free days in an average year: 218
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 12 | Oct 26 |
| Frost (32°F) | Every year | Apr 1 | Nov 4 |
| Hard freeze (28°F) | Every year | Mar 22 | Nov 15 |
Nights at 32°F or colder in an average year: 79
What to plant now in St. Louis
- 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 March 30 St. Louis: April 1
- Fall planting calendar for an average first frost around October 30 St. Louis: November 4
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
- Florissant 12 mi · last frost Apr 2
- Arnold 16 mi · last frost Apr 9
- Chesterfield 18 mi · last frost Apr 4
- St. Charles 18 mi · last frost Apr 8
- St. Peters 22 mi · last frost Apr 9
Updated