Frost dates in Irwin, IL

The average last spring frost in Irwin is around April 19 and the first fall frost is around October 15. That gives Irwin an average growing season of about 179 days.

Last spring frost

Early (10% chance after)April 9
Average (50%)April 19
Late (90%)May 5

First fall frost

Early (10%)October 2
Average (50%)October 15
Late (90% chance before)November 2

See the Irwin planting calendar →