Frost dates in Oak Forest, IL

The average last spring frost in Oak Forest is around April 27 and the first fall frost is around October 17. That gives Oak Forest an average growing season of about 173 days.

Last spring frost

Early (10% chance after)April 9
Average (50%)April 27
Late (90%)May 11

First fall frost

Early (10%)October 3
Average (50%)October 17
Late (90% chance before)November 2

See the Oak Forest planting calendar →