TODAY NOV22
TEMPERATURE51
HUMIDITY48
PRESSURE
WIND COND.285 0
  • 7547Fri
  • 6251Sat60%80%
  • 6449Sun30%30%
  • 6350Mon
  • 6449Tue
daynightWeather update from LOS ANGELES DOWNTOWN at
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Weather Quick Facts

  • The highest monthly average temperature in San Marino for August is 72.5 degrees
  • The lowest monthly average temperature in San Marino for December is 57 degrees
  • The most monthly precipitation in San Marino occurs in January with 3.5 inches
  • The air quality index in San Marino is 71% worse than the national average
  • The pollution index in San Marino is 5017% worse than the national average

Compare San Marino, CA Weather

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      San Marino 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
      January48°F70°F58°F3.5"
      February50°F70°F59°F2.9"
      March52°F72°F61°F1.5"
      April55°F74°F63°F0.7"
      May58°F75°F65°F0.5"
      June61°F78°F68°F0.0"
      July65°F83°F72°F0.0"
      August65°F84°F73°F0.0"
      September64°F85°F72°F0.3"
      October60°F81°F69°F0.7"
      November54°F75°F63°F0.8"
      December48°F69°F57°F2.8"

      San Marino 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 MarinoCaliforniaNational
      Air quality index725542
      Pollution index139,490,00010,473,1902,726,193

      San Marino air quality

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      Air quality details

      PollutantTotal
      Arsenic0.200%
      Benzene0.950%
      Carbon Tetrachloride0.080%
      Lead1.320%
      Mercury0.440%

      Average monthly San Marino temperature with heat index

      San Marino monthly precipitation with daily maximum

      San Marino monthly snow depth with daily maximum

      San Marino monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Azusa, CA49,5847244.0%
      Citrus, CA10,1057244.0%
      Irwindale, CA1,3657244.0%
      Valinda, CA22,6657244.0%
      West Puente Valley, CA23,5557244.0%
      San Marino, CA13,0207244.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lloydminster (Part), SK13,022n/a 
      Coolidge, AZ13,0167448.0%
      Red Oak, TX13,010512.0%
      Butler, PA13,0083138.0%
      Dunmore, PA13,0083824.0%
      San Marino, CA13,0207244.0%
      Source: The San Marino, 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.