Frost dates in St. John, WA

The average last spring frost in St. John is around May 18 and the first fall frost is around September 21. That gives St. John an average growing season of about 126 days.

Last spring frost

Early (10% chance after)April 28
Average (50%)May 18
Late (90%)June 27

First fall frost

Early (10%)September 4
Average (50%)September 21
Late (90% chance before)October 13

See the St. John planting calendar →