Frost dates in Petersburg, IN
The average last spring frost in Petersburg is around April 8 and the first fall frost is around October 23. That gives Petersburg an average growing season of about 198 days.
Last spring frost
| Early (10% chance after) | March 27 |
|---|---|
| Average (50%) | April 8 |
| Late (90%) | April 18 |
First fall frost
| Early (10%) | October 16 |
|---|---|
| Average (50%) | October 23 |
| Late (90% chance before) | November 3 |