Last frost date in Carbondale, Illinois
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 22
Average first frost in fall. 1 year in 10 it comes by October 10.
Source: NOAA U.S. Climate Normals 1991–2020, station Carbondale Sewage Plt (USC00111265), 3.2 miles from Carbondale, elevation 390 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Herrin and Marion, so their frost dates are the same as Carbondale's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 25 | Apr 9 | Apr 25 |
| First frost in fall | Oct 10 | Oct 22 | Nov 2 |
Frost-free days in an average year: 195
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 22 | Oct 13 |
| Frost (32°F) | Every year | Apr 9 | Oct 22 |
| Hard freeze (28°F) | Every year | Mar 29 | Nov 1 |
Nights at 32°F or colder in an average year: 103
What to plant now in Carbondale
- Spring planting calendar for an average last frost around April 10 Carbondale: April 9
- Fall planting calendar for an average first frost around October 20 Carbondale: October 22
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
- Mount Vernon 44 mi · last frost Apr 11
- Centralia 56 mi · last frost Apr 9
- Waterloo 66 mi · last frost Apr 9
- Belleville 69 mi · last frost Apr 12
- Columbia 74 mi · last frost Apr 6
Updated