Frost dates in Arnold, PA
The average last spring frost in Arnold is around April 23 and the first fall frost is around October 30. That gives Arnold an average growing season of about 190 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 23 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 18 |
|---|---|
| Average (50%) | October 30 |
| Late (90% chance before) | November 8 |