Frost dates in Winona, MN
The average last spring frost in Winona is around April 27 and the first fall frost is around October 7. That gives Winona an average growing season of about 163 days.
Last spring frost
| Early (10% chance after) | April 10 |
|---|---|
| Average (50%) | April 27 |
| Late (90%) | May 13 |
First fall frost
| Early (10%) | September 25 |
|---|---|
| Average (50%) | October 7 |
| Late (90% chance before) | October 25 |