Frost dates in Oskaloosa, IA
The average last spring frost in Oskaloosa is around April 24 and the first fall frost is around October 9. That gives Oskaloosa an average growing season of about 168 days.
Last spring frost
| Early (10% chance after) | April 13 |
|---|---|
| Average (50%) | April 24 |
| Late (90%) | May 9 |
First fall frost
| Early (10%) | September 24 |
|---|---|
| Average (50%) | October 9 |
| Late (90% chance before) | October 25 |