Frost dates in Dillon, MT

The average last spring frost in Dillon is around June 6 and the first fall frost is around September 9. That gives Dillon an average growing season of about 95 days.

Last spring frost

Early (10% chance after)May 14
Average (50%)June 6
Late (90%)June 30

First fall frost

Early (10%)August 20
Average (50%)September 9
Late (90% chance before)September 23

See the Dillon planting calendar →