Frost dates in Dayton, OH

The average last spring frost in Dayton is around April 15 and the first fall frost is around October 27. That gives Dayton an average growing season of about 195 days.

Last spring frost

Early (10% chance after)April 2
Average (50%)April 15
Late (90%)May 4

First fall frost

Early (10%)October 6
Average (50%)October 27
Late (90% chance before)November 8

See the Dayton planting calendar →