Frost dates in Chelsea, SD

The average last spring frost in Chelsea is around May 15 and the first fall frost is around September 22. That gives Chelsea an average growing season of about 130 days.

Last spring frost

Early (10% chance after)April 27
Average (50%)May 15
Late (90%)May 28

First fall frost

Early (10%)September 11
Average (50%)September 22
Late (90% chance before)October 8

See the Chelsea planting calendar →