Frost dates in River Grove, IL

The average last spring frost in River Grove is around April 22 and the first fall frost is around October 15. That gives River Grove an average growing season of about 176 days.

Last spring frost

Early (10% chance after)April 9
Average (50%)April 22
Late (90%)May 10

First fall frost

Early (10%)October 2
Average (50%)October 15
Late (90% chance before)November 6

See the River Grove planting calendar →