Frost dates in St. Clair, MN

The average last spring frost in St. Clair is around April 30 and the first fall frost is around October 3. That gives St. Clair an average growing season of about 156 days.

Last spring frost

Early (10% chance after)April 20
Average (50%)April 30
Late (90%)May 12

First fall frost

Early (10%)September 21
Average (50%)October 3
Late (90% chance before)October 11

See the St. Clair planting calendar →