TODAY DEC18
TEMPERATURE60
HUMIDITY80
PRESSURE30.24
WIND COND.
  • 7453Wed
  • 7954Thu
  • 7153Fri
  • 6852Sat
  • 6852Sun
daynightWeather update from Hawthorne, Hawthorne Municipal Airport at

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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"

Did you know?

  • 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 48% worse than the national average.
  • The pollution index in Westmont is 16% better than the national average.

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Compare Westmont, CA Weather To Other Cities

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 index745550
Pollution index4,251,41018,106,7265,066,862

Westmont air quality information

MeasurementTotal
Days measured365
Days with good air quality25
Days with moderate air quality260
Days w/ poor A.Q. for sensitive groups76
Days with unhealthy air quality4

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.
Long Beach, CA469,7937448%
Manhattan Beach, CA35,5737448%
Monterey Park, CA61,0017448%
Pico Rivera, CA63,7247448%
Rolling Hills CDP, CA8327448%
Westmont, CA32,1477448%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Centereach, NY32,157476%
Pullman, WA32,1762354%
North Olmsted, OH32,1085510%
Laramie, WY32,0964314%
Farmers Branch, TX32,211548%
Westmont, CA32,1477448%
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.