Frost dates in Plentywood, MT

The average last spring frost in Plentywood is around May 18 and the first fall frost is around September 17. That gives Plentywood an average growing season of about 122 days.

Last spring frost

Early (10% chance after)May 6
Average (50%)May 18
Late (90%)June 4

First fall frost

Early (10%)September 5
Average (50%)September 17
Late (90% chance before)September 24

See the Plentywood planting calendar →