Frost dates in Ireton, IA

The average last spring frost in Ireton is around May 3 and the first fall frost is around September 28. That gives Ireton an average growing season of about 148 days.

Last spring frost

Early (10% chance after)April 21
Average (50%)May 3
Late (90%)May 15

First fall frost

Early (10%)September 16
Average (50%)September 28
Late (90% chance before)October 15

See the Ireton planting calendar →