Frost dates in Pentwater, MI
The average last spring frost in Pentwater is around May 16 and the first fall frost is around October 5. That gives Pentwater an average growing season of about 142 days.
Last spring frost
| Early (10% chance after) | April 28 |
|---|---|
| Average (50%) | May 16 |
| Late (90%) | May 29 |
First fall frost
| Early (10%) | September 20 |
|---|---|
| Average (50%) | October 5 |
| Late (90% chance before) | October 25 |