Last frost date in Granite City, Illinois
April 4
Average last frost in spring. In an early year (1 in 10) it's over by March 18; in a late year (1 in 10) it comes after April 19.
November 5
Average first frost in fall. 1 year in 10 it comes by October 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Alton - Melvin Price L&d (USC00110137), 9.6 miles from Granite City, elevation 405 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Alton, Edwardsville, Glen Carbon, Godfrey and Wood River, so their frost dates are the same as Granite City's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 18 | Apr 4 | Apr 19 |
| First frost in fall | Oct 25 | Nov 5 | Nov 21 |
Frost-free days in an average year: 214
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 14 | Oct 27 |
| Frost (32°F) | Every year | Apr 4 | Nov 5 |
| Hard freeze (28°F) | Every year | Mar 25 | Nov 16 |
Nights at 32°F or colder in an average year: 85
What to plant now in Granite City
- Mustard greensAug 15 – Nov 1Now
- Garden peasSept 1 – Nov 1Now
- ParsleySept 1 – Nov 15Now
- RadishesSept 1 – Nov 15Now
- SpinachSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 1Now
- Onion setsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Asparagus plantsDec 1 – Jan 1Soon
- Spring planting calendar for an average last frost around March 30 Granite City: April 4
- Fall planting calendar for an average first frost around November 10 Granite City: November 5
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
- Collinsville 7 mi · last frost Apr 8
- Belleville 16 mi · last frost Apr 12
- Columbia 19 mi · last frost Apr 6
- Waterloo 27 mi · last frost Apr 9
- Centralia 56 mi · last frost Apr 9
Updated