Frost dates in Harvel, IL
The average last spring frost in Harvel is around April 14 and the first fall frost is around October 11. That gives Harvel an average growing season of about 180 days.
Last spring frost
| Early (10% chance after) | March 29 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | April 30 |
First fall frost
| Early (10%) | September 25 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 30 |