Frost dates in Williamsport, IN
The average last spring frost in Williamsport is around April 22 and the first fall frost is around October 11. That gives Williamsport an average growing season of about 172 days.
Last spring frost
| Early (10% chance after) | April 6 |
|---|---|
| Average (50%) | April 22 |
| Late (90%) | May 16 |
First fall frost
| Early (10%) | September 23 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 23 |