Frost dates in Phoenix, OR

The average last spring frost in Phoenix is around May 7 and the first fall frost is around October 13. That gives Phoenix an average growing season of about 159 days.

Last spring frost

Early (10% chance after)April 20
Average (50%)May 7
Late (90%)May 25

First fall frost

Early (10%)September 24
Average (50%)October 13
Late (90% chance before)November 3

See the Phoenix planting calendar →