Frost dates in Plymouth, MN
The average last spring frost in Plymouth is around April 30 and the first fall frost is around October 7. That gives Plymouth an average growing season of about 160 days.
Last spring frost
| Early (10% chance after) | April 13 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 16 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 7 |
| Late (90% chance before) | October 19 |