TODAY NOV07
TEMPERATURE52
HUMIDITY
PRESSURE101727.12
WIND COND.360 13
  • 7147Thu
  • 7447Fri
  • 7649Sat
  • 7448Sun
  • 7248
daynightWeather update from Cable Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Montclair for August is 77.8 degrees
  • The lowest monthly average temperature in Montclair for December is 54.5 degrees
  • The most monthly precipitation in Montclair occurs in December with 2.6 inches
  • The air quality index in Montclair is 111% worse than the national average
  • The pollution index in Montclair is 736% worse than the national average

Compare Montclair, CA Weather

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      Montclair 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"

      Montclair 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.
      IndexMontclairCaliforniaNational
      Air quality index895542
      Pollution index22,790,90010,473,1902,726,193

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

      Average monthly Montclair temperature with heat index

      Montclair monthly precipitation with daily maximum

      Montclair monthly snow depth with daily maximum

      Montclair monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      La Puente, CA39,7807244.0%
      Vincent, CA16,4057244.0%
      Citrus, CA10,1057244.0%
      Fullerton, CA141,0617244.0%
      South San Jose Hills, CA19,1047244.0%
      Montclair, CA40,0418978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Hagerstown, MD40,0274020.0%
      Spanish Fork, UT40,069468.0%
      Hilton Head Island, SC40,0003922.0%
      Hollister, CA40,1003726.0%
      Cape Girardeau, MO40,1004412.0%
      Montclair, CA40,0418978.0%
      Source: The Montclair, 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.