Frost dates in Highland Park, IL
The average last spring frost in Highland Park is around April 25 and the first fall frost is around October 15. That gives Highland Park an average growing season of about 173 days.
Last spring frost
| Early (10% chance after) | April 14 |
|---|---|
| Average (50%) | April 25 |
| Late (90%) | May 15 |
First fall frost
| Early (10%) | October 2 |
|---|---|
| Average (50%) | October 15 |
| Late (90% chance before) | November 5 |