Frost dates in St. Clair, MI

The average last spring frost in St. Clair is around April 27 and the first fall frost is around October 22. That gives St. Clair an average growing season of about 178 days.

Last spring frost

Early (10% chance after)April 13
Average (50%)April 27
Late (90%)May 16

First fall frost

Early (10%)October 4
Average (50%)October 22
Late (90% chance before)November 10

See the St. Clair planting calendar →