Frost dates in Petaluma, CA

The average last spring frost in Petaluma is around March 11 and the first fall frost is around November 20. That gives Petaluma an average growing season of about 254 days.

Last spring frost

Early (10% chance after)January 31
Average (50%)March 11
Late (90%)April 22

First fall frost

Early (10%)November 1
Average (50%)November 20
Late (90% chance before)December 18

See the Petaluma planting calendar →