Last frost date in Collinsville, Illinois
April 8
Average last frost in spring. In an early year (1 in 10) it's over by March 23; in a late year (1 in 10) it comes after April 23.
October 26
Average first frost in fall. 1 year in 10 it comes by October 12.
Source: NOAA U.S. Climate Normals 1991–2020, station Cahokia St Louis AP (USW00003960), 10.9 miles from Collinsville, elevation 413 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Cahokia Heights, East St. Louis and Fairview Heights, so their frost dates are the same as Collinsville's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 23 | Apr 8 | Apr 23 |
| First frost in fall | Oct 12 | Oct 26 | Nov 7 |
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 19 | Oct 17 |
| Frost (32°F) | Every year | Apr 8 | Oct 26 |
| Hard freeze (28°F) | Every year | Mar 28 | Nov 6 |
Nights at 32°F or colder in an average year: 98
What to plant now in Collinsville
- 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 Collinsville: April 8
- Fall planting calendar for an average first frost around October 30 Collinsville: 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 Illinois
- Granite City 7 mi · last frost Apr 4
- Belleville 11 mi · last frost Apr 12
- Columbia 19 mi · last frost Apr 6
- Waterloo 24 mi · last frost Apr 9
- Centralia 49 mi · last frost Apr 9
Updated