Frost dates in Charleston, IL

The average last spring frost in Charleston is around April 20 and the first fall frost is around October 18. That gives Charleston an average growing season of about 181 days.

Last spring frost

Early (10% chance after)April 6
Average (50%)April 20
Late (90%)May 9

First fall frost

Early (10%)October 4
Average (50%)October 18
Late (90% chance before)November 3

See the Charleston planting calendar →