Frost dates in Thurmont, MD

The average last spring frost in Thurmont is around April 22 and the first fall frost is around October 26. That gives Thurmont an average growing season of about 187 days.

Last spring frost

Early (10% chance after)April 10
Average (50%)April 22
Late (90%)May 7

First fall frost

Early (10%)October 9
Average (50%)October 26
Late (90% chance before)November 7

See the Thurmont planting calendar →