Frost dates in Otterville, IL
The average last spring frost in Otterville is around April 17 and the first fall frost is around October 15. That gives Otterville an average growing season of about 181 days.
Last spring frost
| Early (10% chance after) | April 3 |
|---|---|
| Average (50%) | April 17 |
| Late (90%) | May 4 |
First fall frost
| Early (10%) | October 1 |
|---|---|
| Average (50%) | October 15 |
| Late (90% chance before) | November 2 |