Frost dates in Winfield, IA
The average last spring frost in Winfield is around April 25 and the first fall frost is around October 11. That gives Winfield an average growing season of about 169 days.
Last spring frost
| Early (10% chance after) | April 11 |
|---|---|
| Average (50%) | April 25 |
| Late (90%) | May 8 |
First fall frost
| Early (10%) | September 26 |
|---|---|
| Average (50%) | October 11 |
| Late (90% chance before) | October 26 |