San Francisco, CA Weather

San Francisco, CA Climate Overview

San Francisco, CA, experiences a Mediterranean climate, characterized by mild, wet winters and dry summers. This coastal city benefits from its proximity to the Pacific Ocean, which moderates temperatures year-round, resulting in less seasonal variation compared to inland areas.

During the summer months, temperatures in San Francisco typically range from highs in the mid-60s to low 70s°F, with lows in the mid-50s°F. Winters are mild, with highs in the mid-50s to low 60s°F and lows in the mid-40s°F. Spring and fall serve as transitional periods, with temperatures gradually shifting between winter and summer norms. The city's famous fog, particularly prevalent in summer, can keep coastal areas cooler.

Annually, San Francisco receives about 23 inches of rainfall, with the wettest months occurring from November to March. December is usually the wettest month, while the summer months of June, July, and August see minimal rainfall. Snow is virtually nonexistent in San Francisco due to its mild climate and low elevation.

San Francisco is known for its microclimates, influenced by its complex topography and oceanic proximity. The city itself is a collection of hills and valleys that create varying weather patterns across neighborhoods. The cold waters of the California Current contribute to frequent fog and cool breezes, especially in the summer, while the surrounding hills can block or channel weather systems, leading to localized variations in temperature and precipitation.