TODAY NOV07
TEMPERATURE48
HUMIDITY21
PRESSURE
WIND COND.18 4.8
  • 7348Thu
  • 7248Fri
  • 7349Sat
  • 7249Sun
  • 7147
daynightWeather update from CLAREMONT at
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Weather Quick Facts

  • The highest monthly average temperature in San Dimas for August is 77.8 degrees
  • The lowest monthly average temperature in San Dimas for December is 54.5 degrees
  • The most monthly precipitation in San Dimas occurs in December with 2.6 inches
  • The air quality index in San Dimas is 111% worse than the national average
  • The pollution index in San Dimas is 5017% worse than the national average

Compare San Dimas, CA Weather

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      San Dimas 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
      January44°F69°F56°F2.3"
      February45°F70°F57°F2.0"
      March48°F74°F60°F1.2"
      April51°F77°F62°F0.7"
      May55°F81°F66°F0.4"
      June60°F88°F72°F0.0"
      July65°F94°F77°F0.1"
      August65°F95°F78°F0.0"
      September64°F93°F76°F0.2"
      October57°F84°F69°F0.4"
      November49°F77°F62°F0.6"
      December43°F68°F55°F2.6"

      San Dimas 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 DimasCaliforniaNational
      Air quality index895542
      Pollution index139,490,00010,473,1902,726,193

      San Dimas air quality

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      Air quality details

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

      Average monthly San Dimas temperature with heat index

      San Dimas monthly precipitation with daily maximum

      San Dimas monthly snow depth with daily maximum

      San Dimas monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bradbury, CA8257244.0%
      Hacienda Heights, CA55,3867244.0%
      La Habra Heights, CA5,3187244.0%
      West Whittier-Los Nietos, CA26,1217244.0%
      Duarte, CA21,3997244.0%
      San Dimas, CA33,8128978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ken Caryl, CO33,8155816.0%
      Newark, DE33,8224216.0%
      LaSalle, ON33,838n/a 
      Kearney, NE33,7831962.0%
      Dana Point, CA33,7828978.0%
      San Dimas, CA33,8128978.0%
      Source: The San Dimas, 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.