TODAY MAR06
TEMPERATURE40
HUMIDITY100
PRESSURE
WIND COND.276 25.7
  • 6241Sat
  • 6341Sun
  • 5943Mon20%20%
  • 5745Tue
  • 5742Wed
daynightWeather update from BLACK DIAMOND at

Key findings

  • The highest monthly average temperature in Brentwood for July is 71 degrees
  • The lowest monthly average temperature in Brentwood for January is 47 degrees
  • The most monthly precipitation in Brentwood occurs in December with 2.8 inches
  • The air quality index in Brentwood is 10% better than the national average
  • The pollution index in Brentwood is 170% worse than the national average

Compare Brentwood, CA Weather

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      Brentwood 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"

      Brentwood 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.
      IndexBrentwoodCaliforniaNational
      Air quality index455550
      Pollution index13,698,50018,106,7265,066,862

      Brentwood air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality229
      Days with moderate air quality123
      Days w/ poor A.Q. for sensitive groups12
      Days with unhealthy air quality1

      Brentwood air quality information

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

      Average monthly Brentwood temperature with heat index

      Brentwood monthly precipitation with daily maximum

      Brentwood monthly snow depth with daily maximum

      Brentwood monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Camino Tassajara, CA3,4564020%
      San Ramon, CA74,3664020%
      Pittsburg, CA67,9984020%
      Danville, CA43,7584020%
      Diablo, CA8074020%
      Brentwood, CA56,9234510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Midwest City, OK56,930484%
      Santee, CA56,8396428%
      Sanford, FL57,0393726%
      Oak Lawn, IL56,7745510%
      Tinley Park, IL57,1255510%
      Brentwood, CA56,9234510%
      Source: The Brentwood, 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.