Frost dates in Wilmington, IL

The average last spring frost in Wilmington is around April 16 and the first fall frost is around October 17. That gives Wilmington an average growing season of about 184 days.

Last spring frost

Early (10% chance after)April 2
Average (50%)April 16
Late (90%)May 2

First fall frost

Early (10%)October 3
Average (50%)October 17
Late (90% chance before)November 1

See the Wilmington planting calendar →