Frost dates in Vandalia, IL
The average last spring frost in Vandalia is around April 14 and the first fall frost is around October 15. That gives Vandalia an average growing season of about 184 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 14 |
| Late (90%) | April 28 |
First fall frost
| Early (10%) | September 25 |
|---|---|
| Average (50%) | October 15 |
| Late (90% chance before) | October 29 |