Frost dates in Kalispell, MT

The average last spring frost in Kalispell is around May 23 and the first fall frost is around September 17. That gives Kalispell an average growing season of about 117 days.

Last spring frost

Early (10% chance after)May 4
Average (50%)May 23
Late (90%)June 20

First fall frost

Early (10%)August 31
Average (50%)September 17
Late (90% chance before)October 1

See the Kalispell planting calendar →