Frost dates in Hardin, MT

The average last spring frost in Hardin is around May 13 and the first fall frost is around September 23. That gives Hardin an average growing season of about 133 days.

Last spring frost

Early (10% chance after)April 27
Average (50%)May 13
Late (90%)June 5

First fall frost

Early (10%)September 10
Average (50%)September 23
Late (90% chance before)October 12

See the Hardin planting calendar →