TODAY JUL07
TEMPERATURE77
HUMIDITY58
PRESSURE29.9
WIND COND.260 16.6
  • 7963Wed
  • 7964Thu
  • 8468Fri
  • 8969Sat
  • 9068Sun
daynightWeather update from Hawthorne, Hawthorne Municipal Airport at

Key findings

  • The highest monthly average temperature in Westmont for September is 71 degrees
  • The lowest monthly average temperature in Westmont for December is 57 degrees
  • The most monthly precipitation in Westmont occurs in December with 2.4 inches
  • The air quality index in Westmont is 45% worse than the national average
  • The pollution index in Westmont is 16% better than the national average

Compare Westmont, CA Weather

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      Westmont 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
      January49°F70°F58°F2.2"
      February51°F69°F58°F1.7"
      March53°F70°F60°F1.1"
      April56°F72°F62°F0.6"
      May59°F72°F64°F0.2"
      June62°F74°F67°F0.0"
      July65°F78°F70°F0.0"
      August66°F79°F71°F0.0"
      September65°F80°F71°F0.2"
      October61°F79°F68°F0.4"
      November55°F75°F63°F0.5"
      December49°F68°F57°F2.4"

      Westmont 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.
      IndexWestmontCaliforniaNational
      Air quality index725550
      Pollution index4,251,41018,106,7265,066,862

      Westmont air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      Westmont air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.100%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.000%

      Average monthly Westmont temperature with heat index

      Westmont monthly precipitation with daily maximum

      Westmont monthly snow depth with daily maximum

      Westmont monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Alhambra, CA84,8667244%
      Bellflower, CA77,6877244%
      Cerritos, CA49,7977244%
      Culver City, CA39,3957244%
      East Pasadena, CA6,1597244%
      Westmont, CA32,1477244%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Centereach, NY32,1574314%
      Pullman, WA32,1761864%
      North Olmsted, OH32,10850= 100
      Laramie, WY32,096476%
      Farmers Branch, TX32,211512%
      Westmont, CA32,1477244%
      Source: The Westmont, 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.