Frost dates in Hillrose, CO

The average last spring frost in Hillrose is around May 14 and the first fall frost is around October 7. That gives Hillrose an average growing season of about 146 days.

Last spring frost

Early (10% chance after)April 27
Average (50%)May 14
Late (90%)May 24

First fall frost

Early (10%)September 27
Average (50%)October 7
Late (90% chance before)October 12

See the Hillrose planting calendar →