Frost dates in Clear Lake, SD

The average last spring frost in Clear Lake is around May 10 and the first fall frost is around September 30. That gives Clear Lake an average growing season of about 143 days.

Last spring frost

Early (10% chance after)April 22
Average (50%)May 10
Late (90%)May 22

First fall frost

Early (10%)September 19
Average (50%)September 30
Late (90% chance before)October 16

See the Clear Lake planting calendar →