Frost dates in Bloomington, ID

The average last spring frost in Bloomington is around May 20 and the first fall frost is around September 17. That gives Bloomington an average growing season of about 120 days.

Last spring frost

Early (10% chance after)May 3
Average (50%)May 20
Late (90%)June 10

First fall frost

Early (10%)September 7
Average (50%)September 17
Late (90% chance before)October 5

See the Bloomington planting calendar →