Frost dates in Smithfield, UT

The average last spring frost in Smithfield is around May 18 and the first fall frost is around September 25. That gives Smithfield an average growing season of about 130 days.

Last spring frost

Early (10% chance after)May 3
Average (50%)May 18
Late (90%)June 10

First fall frost

Early (10%)September 11
Average (50%)September 25
Late (90% chance before)October 13

See the Smithfield planting calendar →