Frost dates in Wilsonville, IL
The average last spring frost in Wilsonville is around March 25 and the first fall frost is around November 3. That gives Wilsonville an average growing season of about 223 days.
Last spring frost
| Early (10% chance after) | March 9 |
|---|---|
| Average (50%) | March 25 |
| Late (90%) | April 5 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | November 3 |
| Late (90% chance before) | November 27 |