Frost dates in Grand Ridge, IL
The average last spring frost in Grand Ridge is around April 29 and the first fall frost is around October 17. That gives Grand Ridge an average growing season of about 171 days.
Last spring frost
| Early (10% chance after) | April 3 |
|---|---|
| Average (50%) | April 29 |
| Late (90%) | May 16 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 30 |