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

See the Washington planting calendar →