Frost dates in New Boston, IL

The average last spring frost in New Boston is around April 14 and the first fall frost is around October 25. That gives New Boston an average growing season of about 194 days.

Last spring frost

Early (10% chance after)March 28
Average (50%)April 14
Late (90%)May 10

First fall frost

Early (10%)October 9
Average (50%)October 25
Late (90% chance before)November 8

See the New Boston planting calendar →