Frost dates in Umatilla, OR

The average last spring frost in Umatilla is around March 23 and the first fall frost is around November 2. That gives Umatilla an average growing season of about 224 days.

Last spring frost

Early (10% chance after)March 6
Average (50%)March 23
Late (90%)April 25

First fall frost

Early (10%)October 13
Average (50%)November 2
Late (90% chance before)November 24

See the Umatilla planting calendar →