Frost dates in Bozeman, MT

The average last spring frost in Bozeman is around May 28 and the first fall frost is around September 17. That gives Bozeman an average growing season of about 112 days.

Last spring frost

Early (10% chance after)May 11
Average (50%)May 28
Late (90%)June 21

First fall frost

Early (10%)September 4
Average (50%)September 17
Late (90% chance before)October 4

See the Bozeman planting calendar →