DEMOGRAPHICS / CLIMATE

The climate in the San Francisco Bay area varies according to the topography, although “moderate” is an appropriate description of any season. Along the Pacific Ocean, fog is prevalent for most of the summer, created by the dry inversion of continental air currents and the moist air currents from the Pacific. As you move inward from the coast, the fog disappears through a combination of increased altitude and warmer air. Most of the precipitation in the Bay Area occurs between November and March. While the remaining months may offer showers, they are generally light and inconsistent. Antioch in Contra Costa County receives the lowest average rainfall in the Bay Area, while Muir Woods in Mill Valley usually claims the highest averages. For up-to-date information, contact:

The Sacramento Valley and the sprawling counties that make up the metropolitan area offer many choices in topography and climate, from the mild weather of the urban lowlands to the abundant snowfall and delightful seasonal changes in the high Sierra Nevadas. Generally, this region enjoys a mild climate with relatively low humidity where the days are comfortably warm, sunshine is abundant, and the nights are cool. Although the San Francisco Bay Area is easily accessible, the Sacramento Valley offers a seismically stable region that also lacks the deep fog and chill that prevails during much of the year in San Francisco.

Bay Area Climate
National Weather Service
831-656-1725
https://www.weather.gov/mtr/