TODAY MAR19
TEMPERATURE50
HUMIDITY89
PRESSURE101860
WIND COND.
  • 7450Tue
  • 7552Wed
  • 7551Thu
  • 7350Fri
  • 6748Sat
daynightWeather update from Corona Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Norco for August is 74.3 degrees
  • The lowest monthly average temperature in Norco for December is 52.2 degrees
  • The most monthly precipitation in Norco occurs in January with 11.3 inches
  • The air quality index in Norco is 111% worse than the national average
  • The pollution index in Norco is 736% worse than the national average

Compare Norco, CA Weather

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      Norco 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
      January41°F69°F54°F11.3"
      February41°F71°F55°F4.5"
      March41°F76°F58°F2.0"
      April44°F78°F61°F1.7"
      May48°F79°F64°F0.8"
      June54°F86°F69°F0.0"
      July59°F90°F74°F0.1"
      August58°F92°F74°F0.1"
      September53°F90°F71°F2.2"
      October49°F83°F65°F2.4"
      November42°F78°F59°F3.4"
      December39°F68°F52°F11.0"

      Norco 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.
      IndexNorcoCaliforniaNational
      Air quality index895542
      Pollution index22,790,90010,473,1902,726,193

      Norco 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

      Norco air quality information

      PollutantTotal
      Arsenic0.060%
      Benzene0.190%
      Carbon Tetrachloride0.010%
      Lead0.220%
      Mercury0.230%

      Average monthly Norco temperature with heat index

      Norco monthly precipitation with daily maximum

      Norco monthly snow depth with daily maximum

      Norco monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Grand Terrace, CA12,5598978.0%
      Chino, CA89,1708978.0%
      Coronita, CA3,9688978.0%
      Ontario, CA178,1948978.0%
      Upland, CA77,3488978.0%
      Norco, CA27,0218978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Magna, UT27,029512.0%
      Mount Pleasant, WI27,0083922.0%
      New London, CT27,0013726.0%
      Wakefield, MA27,0414314.0%
      West Chicago, IL26,9985510.0%
      Norco, CA27,0218978.0%
      Source: The Norco, 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.