Frost dates in Charleston, IL
The average last spring frost in Charleston is around April 20 and the first fall frost is around October 18. That gives Charleston an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | November 3 |