TODAY NOV14
TEMPERATURE48
HUMIDITY40
PRESSURE
WIND COND.9 5.6
  • 5739Fri60%30%
  • 5940Sat20%
  • 6543Sun
  • 6444Mon
  • 6848Tue
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Weather Quick Facts

  • The highest monthly average temperature in Fontana for August is 77.6 degrees
  • The lowest monthly average temperature in Fontana for January is 54.3 degrees
  • The most monthly precipitation in Fontana occurs in January with 11.6 inches
  • The air quality index in Fontana is 111% worse than the national average
  • The pollution index in Fontana is 1058% worse than the national average

Compare Fontana, CA Weather

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      Fontana 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
      January43°F66°F54°F11.6"
      February47°F67°F56°F9.6"
      March48°F74°F60°F2.1"
      April50°F76°F61°F4.1"
      May55°F81°F66°F4.8"
      June58°F86°F70°F0.1"
      July65°F94°F78°F0.2"
      August65°F95°F78°F2.3"
      September60°F88°F72°F2.1"
      October57°F82°F67°F4.3"
      November50°F77°F62°F7.7"
      December43°F67°F55°F3.3"

      Fontana 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.
      IndexFontanaCaliforniaNational
      Air quality index895542
      Pollution index31,575,30010,473,1902,726,193

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

      Average monthly Fontana temperature with heat index

      Fontana monthly precipitation with daily maximum

      Fontana monthly snow depth with daily maximum

      Fontana monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bloomington, CA21,9078978.0%
      Jurupa Valley, CA106,6468978.0%
      Chino, CA89,1708978.0%
      Norco, CA27,0218978.0%
      Crestline, CA9,3518978.0%
      Fontana, CA212,7048978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Santa Clarita, CA212,5197244.0%
      Oakville, ON212,353n/a 
      Fayetteville, NC211,2014118.0%
      Birmingham, AL210,928536.0%
      Modesto, CA214,485492.0%
      Fontana, CA212,7048978.0%
      Source: The Fontana, 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.