Frost dates in Stonington, IL

The average last spring frost in Stonington is around April 20 and the first fall frost is around October 24. That gives Stonington an average growing season of about 187 days.

Last spring frost

Early (10% chance after)March 28
Average (50%)April 20
Late (90%)April 23

First fall frost

Early (10%)October 7
Average (50%)October 24
Late (90% chance before)November 10

See the Stonington planting calendar →