Frost dates in Harrisburg, PA
The average last spring frost in Harrisburg is around April 10 and the first fall frost is around October 29. That gives Harrisburg an average growing season of about 202 days.
Last spring frost
| Early (10% chance after) | April 1 |
|---|---|
| Average (50%) | April 10 |
| Late (90%) | April 22 |
First fall frost
| Early (10%) | October 10 |
|---|---|
| Average (50%) | October 29 |
| Late (90% chance before) | November 8 |