Frost dates in Plymouth, WI
The average last spring frost in Plymouth is around May 10 and the first fall frost is around October 8. That gives Plymouth an average growing season of about 151 days.
Last spring frost
| Early (10% chance after) | April 23 |
|---|---|
| Average (50%) | May 10 |
| Late (90%) | May 25 |
First fall frost
| Early (10%) | September 25 |
|---|---|
| Average (50%) | October 8 |
| Late (90% chance before) | October 24 |