Frost dates in Chicago, IL
The average last spring frost in Chicago is around April 7 and the first fall frost is around November 13. That gives Chicago an average growing season of about 220 days.
Last spring frost
| Early (10% chance after) | March 23 |
|---|---|
| Average (50%) | April 7 |
| Late (90%) | April 17 |
First fall frost
| Early (10%) | October 30 |
|---|---|
| Average (50%) | November 13 |
| Late (90% chance before) | November 22 |