Frost dates in Mount Vernon, OR

The average last spring frost in Mount Vernon is around May 19 and the first fall frost is around September 20. That gives Mount Vernon an average growing season of about 124 days.

Last spring frost

Early (10% chance after)May 2
Average (50%)May 19
Late (90%)June 9

First fall frost

Early (10%)September 6
Average (50%)September 20
Late (90% chance before)October 11

See the Mount Vernon planting calendar →