Frost dates in San Ramon, CA

The average last spring frost in San Ramon is around March 26 and the first fall frost is around November 30. That gives San Ramon an average growing season of about 249 days.

Last spring frost

Early (10% chance after)February 11
Average (50%)March 26
Late (90%)April 24

First fall frost

Early (10%)November 12
Average (50%)November 30
Late (90% chance before)December 23

See the San Ramon planting calendar →