Frost dates in Ryegate, MT

The average last spring frost in Ryegate is around May 21 and the first fall frost is around September 23. That gives Ryegate an average growing season of about 125 days.

Last spring frost

Early (10% chance after)April 30
Average (50%)May 21
Late (90%)June 3

First fall frost

Early (10%)September 3
Average (50%)September 23
Late (90% chance before)October 13

See the Ryegate planting calendar →