Frost dates in Tonasket, WA

The average last spring frost in Tonasket is around May 1 and the first fall frost is around October 5. That gives Tonasket an average growing season of about 157 days.

Last spring frost

Early (10% chance after)April 18
Average (50%)May 1
Late (90%)May 12

First fall frost

Early (10%)September 23
Average (50%)October 5
Late (90% chance before)October 11

See the Tonasket planting calendar →