Frost dates in Helena, OH
The average last spring frost in Helena is around April 30 and the first fall frost is around October 8. That gives Helena an average growing season of about 161 days.
Last spring frost
| Early (10% chance after) | April 19 |
|---|---|
| Average (50%) | April 30 |
| Late (90%) | May 11 |
First fall frost
| Early (10%) | September 27 |
|---|---|
| Average (50%) | October 8 |
| Late (90% chance before) | October 30 |