Frost dates in Willoughby, OH
The average last spring frost in Willoughby is around May 2 and the first fall frost is around October 26. That gives Willoughby an average growing season of about 177 days.
Last spring frost
| Early (10% chance after) | April 25 |
|---|---|
| Average (50%) | May 2 |
| Late (90%) | May 22 |
First fall frost
| Early (10%) | October 7 |
|---|---|
| Average (50%) | October 26 |
| Late (90% chance before) | November 19 |