Frost dates in Flat Rock, MI
The average last spring frost in Flat Rock is around April 28 and the first fall frost is around October 17. That gives Flat Rock an average growing season of about 172 days.
Last spring frost
| Early (10% chance after) | March 31 |
|---|---|
| Average (50%) | April 28 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | October 6 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 26 |