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Key findings

  • The highest monthly average temperature in East Valley for August is 78 degrees
  • The lowest monthly average temperature in East Valley for December is 55 degrees
  • The most monthly precipitation in East Valley occurs in December with 1.9 inches
  • The air quality index in East Valley is 79% worse than the national average
  • The pollution index in East Valley is 523% worse than the national average

Compare San Bernardino, CA Weather

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      East Valley 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°F70°F56°F1.6"
      February45°F72°F57°F1.2"
      March47°F75°F60°F0.7"
      April50°F78°F63°F0.5"
      May55°F82°F66°F0.2"
      June59°F89°F72°F0.0"
      July65°F94°F77°F0.2"
      August65°F95°F78°F0.1"
      September63°F94°F76°F0.2"
      October56°F85°F69°F0.2"
      November49°F77°F62°F0.5"
      December44°F69°F55°F1.9"

      East Valley 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.
      IndexEast ValleySan BernardinoCalifornia
      Air quality index898955
      Pollution index31,575,30031,575,30018,106,726

      East Valley 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

      East Valley air quality information

      PollutantTotal
      Arsenic0.110%
      Benzene0.260%
      Carbon Tetrachloride0.020%
      Lead0.350%
      Mercury0.280%

      Average monthly East Valley temperature with heat index

      East Valley monthly precipitation with daily maximum

      East Valley monthly snow depth with daily maximum

      East Valley monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Bloomington, CA23,3228978%
      Fontana, CA205,2288978%
      Jurupa Valley, CA100,7378978%
      Mentone, CA9,9018978%
      Rialto, CA102,4188978%
      San Bernardino, CA214,5818978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Des Moines, IA212,8593922%
      Birmingham, AL212,424536%
      Richmond, VA216,7734412%
      Spokane, WA212,0784314%
      Boise, ID218,6773628%
      San Bernardino, CA214,5818978%
      Source: The East Valley, San Bernardino, 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.