Frost dates in Thayer, IL

The average last spring frost in Thayer is around April 14 and the first fall frost is around October 18. That gives Thayer an average growing season of about 187 days.

Last spring frost

Early (10% chance after)April 2
Average (50%)April 14
Late (90%)April 29

First fall frost

Early (10%)October 2
Average (50%)October 18
Late (90% chance before)November 3

See the Thayer planting calendar →