Frost dates in New Castle, PA
The average last spring frost in New Castle is around May 11 and the first fall frost is around October 9. That gives New Castle an average growing season of about 151 days.
Last spring frost
| Early (10% chance after) | April 25 |
|---|---|
| Average (50%) | May 11 |
| Late (90%) | May 27 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 9 |
| Late (90% chance before) | October 28 |