Frost dates in Rosemont, IL

The average last spring frost in Rosemont is around April 22 and the first fall frost is around October 15. That gives Rosemont 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 Rosemont planting calendar →