Frost dates in Joliet, MT

The average last spring frost in Joliet is around May 26 and the first fall frost is around September 19. That gives Joliet an average growing season of about 116 days.

Last spring frost

Early (10% chance after)May 6
Average (50%)May 26
Late (90%)June 9

First fall frost

Early (10%)September 4
Average (50%)September 19
Late (90% chance before)October 6

See the Joliet planting calendar →