Frost dates in Williamsport, IN

The average last spring frost in Williamsport is around April 22 and the first fall frost is around October 11. That gives Williamsport an average growing season of about 172 days.

Last spring frost

Early (10% chance after)April 6
Average (50%)April 22
Late (90%)May 16

First fall frost

Early (10%)September 23
Average (50%)October 11
Late (90% chance before)October 23

See the Williamsport planting calendar →