TODAY OCT22
TEMPERATURE61
HUMIDITY81
PRESSURE29.99
WIND COND.255 6
  • 7558Mon
  • 7658Tue
  • 7758Wed
  • 8158Thu
  • 8559Fri
daynightWeather update from CW8893 Fountain Valley at
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Westminster 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
January45°F69°F56°F7.4"
February47°F68°F57°F5.5"
March50°F71°F60°F2.6"
April52°F73°F62°F1.3"
May57°F74°F64°F2.3"
June60°F77°F67°F0.1"
July64°F81°F71°F0.5"
August64°F83°F72°F0.2"
September62°F84°F71°F5.2"
October57°F80°F67°F1.7"
November50°F74°F61°F2.9"
December44°F67°F55°F7.6"

Did you know?

  • The highest monthly average temperature in Westminster for August is 72 degrees.
  • The lowest monthly average temperature in Westminster for December is 55 degrees.
  • The most monthly precipitation in Westminster occurs in December with 7.6 inches.
  • The air quality index in Westminster is 48% worse than the national average.
  • The pollution index in Westminster is 83% better than the national average.

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Compare Westminster, CA Weather To Other Cities

Westminster 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.
IndexWestminsterCaliforniaNational
Air quality index745550
Pollution index858,65218,106,7265,066,862

Westminster 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

Westminster air quality information

PollutantTotal
Arsenic0.002%
Benzene0.010%
Carbon Tetrachloride0.000%
Lead0.020%
Mercury0.001%

Average monthly Westminster temperature with heat index

Westminster monthly precipitation with daily maximum

Westminster monthly snow depth with daily maximum

Westminster monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bellflower, CA77,6877448%
Carson, CA92,7807448%
Cudahy, CA24,1067448%
East Whittier, CA10,4357448%
Garden Grove, CA174,6767448%
Westminster, CA91,6357448%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Boca Raton, FL91,7024118%
Miami Beach, FL91,7844118%
San Marcos, CA91,4796122%
Redding, CA91,3203824%
Lynn, MA92,074476%
Westminster, CA91,6357448%
Source: The Westminster, 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.