Frost dates in Upton, WY

The average last spring frost in Upton is around May 22 and the first fall frost is around September 19. That gives Upton an average growing season of about 120 days.

Last spring frost

Early (10% chance after)May 5
Average (50%)May 22
Late (90%)June 14

First fall frost

Early (10%)September 4
Average (50%)September 19
Late (90% chance before)October 7

See the Upton planting calendar →