Frost dates in Philadelphia, NY
The average last spring frost in Philadelphia is around May 2 and the first fall frost is around October 13. That gives Philadelphia an average growing season of about 164 days.
Last spring frost
| Early (10% chance after) | March 23 |
|---|---|
| Average (50%) | May 2 |
| Late (90%) | May 16 |
First fall frost
| Early (10%) | September 29 |
|---|---|
| Average (50%) | October 13 |
| Late (90% chance before) | November 1 |