Frost dates in Vermilion, IL
The average last spring frost in Vermilion is around April 22 and the first fall frost is around October 20. That gives Vermilion an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 8 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 10 |
First fall frost
| Early (10%) | October 4 |
|---|---|
| Average (50%) | October 20 |
| Late (90% chance before) | November 4 |