Frost dates in Pullman, WA

The average last spring frost in Pullman is around May 12 and the first fall frost is around September 27. That gives Pullman an average growing season of about 138 days.

Last spring frost

Early (10% chance after)April 20
Average (50%)May 12
Late (90%)May 27

First fall frost

Early (10%)September 10
Average (50%)September 27
Late (90% chance before)October 23

See the Pullman planting calendar →