TODAY FEB27
TEMPERATURE52
HUMIDITY37
PRESSURE
WIND COND.51 3.2
  • 6945Sat
  • 6943Sun
  • 7244Mon
  • 6946Tue
  • 6545Wed
daynightWeather update from CLAREMONT at

Key findings

  • The highest monthly average temperature in San Dimas for August is 78 degrees
  • The lowest monthly average temperature in San Dimas for December is 55 degrees
  • The most monthly precipitation in San Dimas occurs in December with 2.6 inches
  • The air quality index in San Dimas is 79% worse than the national average
  • The pollution index in San Dimas is 2653% 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 index895550
      Pollution index139,490,00018,106,7265,066,862

      San Dimas air quality information

      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

      San Dimas air quality information

      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

      City, StatePopulationAir Quality IndexNational Avg.
      La Mirada, CA49,1307244%
      Whittier, CA86,6307244%
      Monrovia, CA37,0907244%
      El Monte, CA115,6657244%
      Sierra Madre, CA11,0677244%
      San Dimas, CA34,1098978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Bay City, MI34,1102648%
      Redan, GA34,100524%
      Seaside, CA34,1203726%
      Hinesville, GA34,1273922%
      Dakota Ridge, CO34,133476%
      San Dimas, CA34,1098978%
      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.