Frost dates in Port Jefferson, NY
The average last spring frost in Port Jefferson is around April 10 and the first fall frost is around November 9. That gives Port Jefferson an average growing season of about 213 days.
Last spring frost
| Early (10% chance after) | March 28 |
|---|---|
| Average (50%) | April 10 |
| Late (90%) | April 24 |
First fall frost
| Early (10%) | November 4 |
|---|---|
| Average (50%) | November 9 |
| Late (90% chance before) | November 17 |