Frost dates in Mackinaw City, MI
The average last spring frost in Mackinaw City is around May 12 and the first fall frost is around October 13. That gives Mackinaw City an average growing season of about 154 days.
Last spring frost
| Early (10% chance after) | April 27 |
|---|---|
| Average (50%) | May 12 |
| Late (90%) | May 26 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | November 4 |