Frost dates in Long Grove, IL
The average last spring frost in Long Grove is around April 29 and the first fall frost is around October 17. That gives Long Grove an average growing season of about 171 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | April 29 |
| Late (90%) | May 17 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 30 |