Frost dates in Rancho Cucamonga, CA

The average last spring frost in Rancho Cucamonga is around February 3 and the first fall frost is around December 16. That gives Rancho Cucamonga an average growing season of about 317 days.

Last spring frost

Early (10% chance after)January 12
Average (50%)February 3
Late (90%)February 25

First fall frost

Early (10%)November 28
Average (50%)December 16
Late (90% chance before)December 27

See the Rancho Cucamonga planting calendar →