Frost dates in Lock Haven, PA
The average last spring frost in Lock Haven is around April 30 and the first fall frost is around October 18. That gives Lock Haven an average growing season of about 171 days.
Last spring frost
| Early (10% chance after) | April 15 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 18 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 18 |
| Late (90% chance before) | October 31 |