Frost dates in De Smet, SD

The average last spring frost in De Smet is around May 10 and the first fall frost is around September 29. That gives De Smet an average growing season of about 142 days.

Last spring frost

Early (10% chance after)April 18
Average (50%)May 10
Late (90%)May 27

First fall frost

Early (10%)September 16
Average (50%)September 29
Late (90% chance before)October 15

See the De Smet planting calendar →