Frost dates in Hanna, OK
The average last spring frost in Hanna is around April 4 and the first fall frost is around October 30. That gives Hanna an average growing season of about 209 days.
Last spring frost
| Early (10% chance after) | March 21 |
|---|---|
| Average (50%) | April 4 |
| Late (90%) | April 16 |
First fall frost
| Early (10%) | October 14 |
|---|---|
| Average (50%) | October 30 |
| Late (90% chance before) | November 11 |