Frost dates in Philomath, OR

The average last spring frost in Philomath is around April 28 and the first fall frost is around October 30. That gives Philomath an average growing season of about 185 days.

Last spring frost

Early (10% chance after)April 8
Average (50%)April 28
Late (90%)May 20

First fall frost

Early (10%)October 11
Average (50%)October 30
Late (90% chance before)November 21

See the Philomath planting calendar →