Livermore Valley has a moderate coastal climate that results from its proximity to San Francisco Bay and the Pacific Ocean. The cool marine winds and morning fog enter the Livermore Valley from San Francisco Bay through gaps in the western hills of Alameda moderating temperatures during the growing season and keeping the area’s vineyards relatively frost free. Average summer time high in July is 90 degrees. Annual rainfall is 15 inches a year with January, February and March the wettest months.
