Frost dates in Okoboji, IA

The average last spring frost in Okoboji is around April 27 and the first fall frost is around October 9. That gives Okoboji an average growing season of about 165 days.

Last spring frost

Early (10% chance after)April 9
Average (50%)April 27
Late (90%)May 15

First fall frost

Early (10%)September 27
Average (50%)October 9
Late (90% chance before)October 27

See the Okoboji planting calendar →