Frost dates in Tonkawa, OK
The average last spring frost in Tonkawa is around April 9 and the first fall frost is around October 19. That gives Tonkawa an average growing season of about 193 days.
Last spring frost
| Early (10% chance after) | March 14 |
|---|---|
| Average (50%) | April 9 |
| Late (90%) | April 24 |
First fall frost
| Early (10%) | October 10 |
|---|---|
| Average (50%) | October 19 |
| Late (90% chance before) | November 4 |