Frost dates in Harper Woods, MI
The average last spring frost in Harper Woods is around April 22 and the first fall frost is around October 25. That gives Harper Woods an average growing season of about 186 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | October 12 |
|---|---|
| Average (50%) | October 25 |
| Late (90% chance before) | November 8 |