Frost dates in Joliet, IL
The average last spring frost in Joliet is around April 21 and the first fall frost is around October 19. That gives Joliet an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 21 |
| Late (90%) | May 8 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 3 |