Frost dates in Woodburn, IA
The average last spring frost in Woodburn is around April 23 and the first fall frost is around October 11. That gives Woodburn an average growing season of about 171 days.
Last spring frost
| Early (10% chance after) | April 9 |
|---|---|
| Average (50%) | April 23 |
| Late (90%) | May 11 |
First fall frost
| Early (10%) | September 28 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 28 |