Frost dates in Colby, WI

The average last spring frost in Colby is around May 17 and the first fall frost is around September 24. That gives Colby an average growing season of about 130 days.

Last spring frost

Early (10% chance after)April 30
Average (50%)May 17
Late (90%)May 30

First fall frost

Early (10%)September 6
Average (50%)September 24
Late (90% chance before)October 8

See the Colby planting calendar →