Frost dates in Mount Crested Butte, CO

The average last spring frost in Mount Crested Butte is around June 6 and the first fall frost is around September 21. That gives Mount Crested Butte an average growing season of about 107 days.

Last spring frost

Early (10% chance after)May 25
Average (50%)June 6
Late (90%)June 23

First fall frost

Early (10%)September 9
Average (50%)September 21
Late (90% chance before)October 6

See the Mount Crested Butte planting calendar →