Frost dates in Pontiac, IL
The average last spring frost in Pontiac is around April 20 and the first fall frost is around October 19. That gives Pontiac an average growing season of about 182 days.
Last spring frost
| Early (10% chance after) | April 7 |
|---|---|
| Average (50%) | April 20 |
| Late (90%) | May 7 |
First fall frost
| Early (10%) | October 5 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 3 |