Frost dates in Harbor Springs, MI
The average last spring frost in Harbor Springs is around May 11 and the first fall frost is around October 12. That gives Harbor Springs an average growing season of about 154 days.
Last spring frost
| Early (10% chance after) | April 25 |
|---|---|
| Average (50%) | May 11 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 26 |
|---|---|
| Average (50%) | October 12 |
| Late (90% chance before) | October 31 |