Frost dates in Shelley, ID

The average last spring frost in Shelley is around May 25 and the first fall frost is around September 19. That gives Shelley an average growing season of about 117 days.

Last spring frost

Early (10% chance after)May 2
Average (50%)May 25
Late (90%)June 16

First fall frost

Early (10%)September 4
Average (50%)September 19
Late (90% chance before)October 6

See the Shelley planting calendar →