Frost dates in Mountain Home, ID

The average last spring frost in Mountain Home is around May 20 and the first fall frost is around September 21. That gives Mountain Home an average growing season of about 124 days.

Last spring frost

Early (10% chance after)April 26
Average (50%)May 20
Late (90%)June 18

First fall frost

Early (10%)August 31
Average (50%)September 21
Late (90% chance before)October 10

See the Mountain Home planting calendar →