Frost dates in Detroit, IL
The average last spring frost in Detroit is around April 15 and the first fall frost is around October 26. That gives Detroit an average growing season of about 194 days.
Last spring frost
| Early (10% chance after) | March 29 |
|---|---|
| Average (50%) | April 15 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 8 |
|---|---|
| Average (50%) | October 26 |
| Late (90% chance before) | November 5 |