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Key findings

  • The highest monthly average temperature in San Ramon for July is 70.9 degrees
  • The lowest monthly average temperature in San Ramon for January is 47.4 degrees
  • The most monthly precipitation in San Ramon occurs in December with 2.8 inches
  • The air quality index in San Ramon is 20% better than the national average
  • The pollution index in San Ramon is 170% worse than the national average

Compare San Ramon, CA Weather

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      San Ramon Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January38°F59°F47°F2.6"
      February41°F63°F51°F2.6"
      March43°F67°F54°F2.1"
      April45°F72°F57°F1.4"
      May50°F78°F62°F0.3"
      June54°F85°F67°F0.2"
      July58°F90°F71°F0.0"
      August57°F89°F70°F0.0"
      September56°F88°F69°F0.1"
      October50°F79°F63°F0.9"
      November43°F67°F54°F1.5"
      December38°F60°F48°F2.8"

      San Ramon air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSan RamonCaliforniaNational
      Air quality index405550
      Pollution index13,698,50018,106,7265,066,862

      San Ramon air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality290
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      San Ramon air quality information

      PollutantTotal
      Arsenic0.040%
      Benzene0.110%
      Carbon Tetrachloride0.330%
      Lead0.070%
      Mercury0.120%

      Average monthly San Ramon temperature with heat index

      San Ramon monthly precipitation with daily maximum

      San Ramon monthly snow depth with daily maximum

      San Ramon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Acalanes Ridge, CA1,0004020%
      Concord, CA126,9384020%
      Orinda, CA18,9364020%
      San Miguel, CA3,2144020%
      Ashland, CA24,2884020%
      San Ramon, CA74,3664020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Schaumburg, IL74,3665510%
      Bolingbrook, IL74,3205510%
      Conroe, TX74,482524%
      Kendall, FL74,5594118%
      Decatur, IL74,0634412%
      San Ramon, CA74,3664020%
      Source: The San Ramon, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.