TODAY MAR29
TEMPERATURE55
HUMIDITY72
PRESSURE101560
WIND COND.250 9.4
  • 6246Fri50%
  • 5445Sat100%60%
  • 5744Sun60%50%
  • 6546Mon
  • 7351Tue
daynightWeather update from San Bernardino Intl. Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Hi-30 for August is 77.8 degrees
  • The lowest monthly average temperature in Hi-30 for December is 55.1 degrees
  • The most monthly precipitation in Hi-30 occurs in December with 1.9 inches
  • The air quality index in Hi-30 is 111% worse than the national average
  • The pollution index in Hi-30 is 1058% worse than the national average

Compare San Bernardino, CA Weather

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      Hi-30 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"

      Hi-30 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.
      IndexHi-30San BernardinoCalifornia
      Air quality index898955
      Pollution index31,575,30031,575,30010,473,190

      Hi-30 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

      Hi-30 air quality information

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

      Average monthly Hi-30 temperature with heat index

      Hi-30 monthly precipitation with daily maximum

      Hi-30 monthly snow depth with daily maximum

      Hi-30 monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake Arrowhead, CA9,7418978.0%
      Grand Terrace, CA12,5598978.0%
      Mentone, CA10,1418978.0%
      Crestline, CA9,3518978.0%
      Muscoy, CA11,5468978.0%
      San Bernardino, CA216,7848978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Tacoma, WA215,7661864.0%
      Des Moines, IA215,4083922.0%
      Richmond Hill, ON215,407n/a 
      Spring Valley, NV218,697548.0%
      Enterprise, NV214,591548.0%
      San Bernardino, CA216,7848978.0%
      Source: The Hi-30, 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.