Frost dates in Wynona, OK
The average last spring frost in Wynona is around April 10 and the first fall frost is around October 24. That gives Wynona an average growing season of about 197 days.
Last spring frost
| Early (10% chance after) | March 29 |
|---|---|
| Average (50%) | April 10 |
| Late (90%) | April 23 |
First fall frost
| Early (10%) | October 10 |
|---|---|
| Average (50%) | October 24 |
| Late (90% chance before) | November 8 |