Last frost date in Arnold, Missouri
April 9
Average last frost in spring. In an early year (1 in 10) it's over by March 25; in a late year (1 in 10) it comes after April 25.
October 26
Average first frost in fall. 1 year in 10 it comes by October 14.
Source: NOAA U.S. Climate Normals 1991–2020, station Festus (USC00232850), 13.5 miles from Arnold, elevation 600 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Festus, so its frost dates are the same as Arnold's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 25 | Apr 9 | Apr 25 |
| First frost in fall | Oct 14 | Oct 26 | Nov 8 |
Frost-free days in an average year: 197
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 22 | Oct 17 |
| Frost (32°F) | Every year | Apr 9 | Oct 26 |
| Hard freeze (28°F) | Every year | Mar 31 | Nov 5 |
Nights at 32°F or colder in an average year: 105
What to plant now in Arnold
- 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 April 10 Arnold: April 9
- Fall planting calendar for an average first frost around October 30 Arnold: October 26
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
- St. Louis 16 mi · last frost Apr 1
- Wildwood 19 mi · last frost Apr 12
- Chesterfield 20 mi · last frost Apr 4
- Florissant 26 mi · last frost Apr 2
- St. Charles 27 mi · last frost Apr 8
Updated