Frost dates in Willow Springs, IL
The average last spring frost in Willow Springs is around April 21 and the first fall frost is around October 19. That gives Willow Springs an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 13 |
|---|---|
| Average (50%) | April 21 |
| Late (90%) | May 8 |
First fall frost
| Early (10%) | October 13 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | December 2 |