Frost dates in Mount Zion, IL

The average last spring frost in Mount Zion is around April 20 and the first fall frost is around October 17. That gives Mount Zion an average growing season of about 180 days.

Last spring frost

Early (10% chance after)April 10
Average (50%)April 20
Late (90%)May 16

First fall frost

Early (10%)September 29
Average (50%)October 17
Late (90% chance before)November 2

See the Mount Zion planting calendar →