San Ramon (Spanish: San Ramón; meaning Saint Raymond) is a city in Contra Costa County, California, United States. It is a suburban city of the San Francisco Bay Area, and lies in the San Ramon Valley. San Ramon’s population was 72,148 as of the 2010 U.S. Census, with an estimated population of 74,378 in 2012, making it 4th largest city in Contra Costa County, behind Richmond, Concord and Antioch.
San Ramon is home to the headquarters of the Chevron Corporation, 24-Hour Fitness, the West Coast headquarters of AT&T Inc., The Global Software Center of GE, as well as the San Ramon Medical Center. Major annual events include the Art and Wind Festival on Memorial Day weekend and the Primo’s Run for Education in October.
On April 24, 2001, San Ramon received the title Tree City USA.
San Ramon is located at 37°46′48″N 121°58′41″W. It is adjacent to Danville, California, to the north and Dublin, California, to the south. Unincorporated county lands border San Ramon to the east and west. It is located around 500 feet (150 m) above sea level. Mount Diablo flanks the city to the northeast and is prominently visible from almost all parts of the city. The Las Trampas Regional Wilderness borders San Ramon’s extreme northwest, at the northern end of Bollinger Canyon. The smaller Bishop Ranch Regional Preserve straddles San Ramon’s western border, located approximately between Interstate 680 and the Alameda County line.
The topography of San Ramon is varied, featuring a mix of the rolling hills of the Diablo Range and the flatter basin of the San Ramon Valley. The city is predominantly urban and residential; however much of the land around the city’s perimeter regions remains undeveloped, and is covered by grasslands and oak tree orchards. During the drier months the grasses are golden; with the precipitation of winter and spring, the grasses turn green, in the late fall and beginning of winter, some trees with all the leaves all fall off and die, and in the late winter and beginning of spring the leaves start growing.
San Ramon’s weather typifies Mediterranean climate, seasonal, and moderate. Summers are warm and dry, while winters are mild, damp and rather short. Its weather is similar to the adjacent cities of Danville, Dublin and Pleasanton. Fog can be infrequent but occurs normally in the western reaches of the city, at the eastern mouth of Crow Canyon, through which marine weather patterns funnel in from the San Francisco Bay via Castro Valley. It usually burns off by mid-to-late morning.
Average January temperatures are a maximum of 58 °F (14 °C) and a minimum of 32 °F (0 °C). Average July temperatures are a maximum of 89 °F (32 °C) and a minimum of 56 °F (13 °C). January is normally the wettest month, averaging 5.20 inches (132 mm) of precipitation. July is usually the driest month, with an average of only 0.06 inches (1.5 mm) of precipitation. Snow is very rare, but Hail occurs sometimes in the winter.