Frost dates in Kootenai, ID

The average last spring frost in Kootenai is around May 17 and the first fall frost is around September 18. That gives Kootenai an average growing season of about 124 days.

Last spring frost

Early (10% chance after)April 30
Average (50%)May 17
Late (90%)June 6

First fall frost

Early (10%)September 1
Average (50%)September 18
Late (90% chance before)October 8

See the Kootenai planting calendar →