Frost dates in Iliff, CO

The average last spring frost in Iliff is around May 8 and the first fall frost is around September 29. That gives Iliff an average growing season of about 144 days.

Last spring frost

Early (10% chance after)April 23
Average (50%)May 8
Late (90%)May 22

First fall frost

Early (10%)September 15
Average (50%)September 29
Late (90% chance before)October 16

See the Iliff planting calendar →