Frost dates in Cosmopolis, WA

The average last spring frost in Cosmopolis is around April 16 and the first fall frost is around November 4. That gives Cosmopolis an average growing season of about 202 days.

Last spring frost

Early (10% chance after)March 20
Average (50%)April 16
Late (90%)May 6

First fall frost

Early (10%)October 11
Average (50%)November 4
Late (90% chance before)December 3

See the Cosmopolis planting calendar →