San Ramon

Geography

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 with many new housing developments; 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, but with the precipitation of winter and spring, the grasses turn green. San Ramon's weather typifies a Mediterranean climate, seasonal, and moderate. Summers can range from warm to hot and dry, while winters are cool, wet 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. Snow in the lower elevations of the San Francisco Bay Area (including East Bay) is generally considered extremely rare, however, the East Bay lower elevation cities are affected by chance of light snowfall or dusting twice in 5 years.

Race & ethnicity

Most-observed species

• Anna's Hummingbird

  Calypte anna (R.Lesson, 1829) · Aves
  28,846
• House Finch

  Haemorhous mexicanus (P.L.Statius Müller, 1776) · Aves
  28,816
• California/Woodhouse's Scrub-Jay

  Aphelocoma californica (Vigors, 1839) · Aves
  26,710
• Turkey Vulture

  Cathartes aura (Linnaeus, 1758) · Aves
  23,478
• American Crow

  Corvus brachyrhynchos C.L.Brehm, 1822 · Aves
  23,191
• California Towhee

  Melozone crissalis (Vigors, 1839) · Aves
  22,233
• Black Phoebe

  Sayornis nigricans (Swainson, 1827) · Aves
  21,868
• Oak Titmouse

  Baeolophus inornatus (Gambel, 1845) · Aves
  21,809

Most recent

• M 3.6 — 2026-06-07
  3 km SW of Alamo, CA
• M 2.65 — 2026-06-04
  7 km E of Fremont, CA
• M 2.72 — 2026-05-10
  2 km ESE of Pinole, CA
• M 2.52 — 2026-05-02
  20 km SE of Livermore, CA
• M 2.77 — 2026-04-30
  14 km N of Morgan Hill, CA
• M 2.62 — 2026-04-26
  16 km E of Seven Trees, CA