Frost dates in Washington, OK
The average last spring frost in Washington is around March 31 and the first fall frost is around October 30. That gives Washington an average growing season of about 213 days.
Last spring frost
| Early (10% chance after) | March 9 |
|---|---|
| Average (50%) | March 31 |
| Late (90%) | April 20 |
First fall frost
| Early (10%) | October 16 |
|---|---|
| Average (50%) | October 30 |
| Late (90% chance before) | November 15 |