Frost dates in River Forest, IN
The average last spring frost in River Forest is around April 25 and the first fall frost is around October 17. That gives River Forest an average growing season of about 175 days.
Last spring frost
| Early (10% chance after) | April 11 |
|---|---|
| Average (50%) | April 25 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | November 2 |