Frost dates in McLean, IL
The average last spring frost in McLean is around April 16 and the first fall frost is around October 13. That gives McLean an average growing season of about 180 days.
Last spring frost
| Early (10% chance after) | April 12 |
|---|---|
| Average (50%) | April 16 |
| Late (90%) | April 30 |
First fall frost
| Early (10%) | October 5 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | October 31 |