TODAY MAR19
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 6135Tue
  • 6135Wed
  • 6636Thu
  • 6237Fri
  • 6539Sat
daynightWeather update from Broomfield / Jeffco at
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Weather Quick Facts

  • The highest monthly average temperature in Westminster for July is 73.1 degrees
  • The lowest monthly average temperature in Westminster for December is 29.8 degrees
  • The most monthly precipitation in Westminster occurs in September with 5.7 inches
  • The air quality index in Westminster is 38% worse than the national average
  • The pollution index in Westminster is 99% better than the national average

Compare Westminster, CO Weather

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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
      January21°F45°F31°F1.8"
      February22°F46°F32°F2.0"
      March30°F58°F42°F2.1"
      April35°F63°F47°F4.0"
      May44°F70°F55°F5.2"
      June54°F84°F68°F4.6"
      July60°F89°F73°F5.7"
      August59°F87°F71°F4.5"
      September51°F79°F63°F5.7"
      October39°F67°F51°F4.1"
      November29°F56°F41°F2.2"
      December19°F44°F30°F2.9"

      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.
      IndexWestminsterColoradoNational
      Air quality index583842
      Pollution index24,0402,068,3422,726,193

      Westminster air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality91
      Days with moderate air quality252
      Days w/ poor A.Q. for sensitive groups20
      Days with unhealthy air quality2

      Westminster air quality information

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

      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

      CityPopulationAir Quality IndexNational Avg.
      Lafayette, CO27,952476.0%
      Boulder, CO108,777476.0%
      Valmont, CO98476.0%
      Louisville, CO19,342476.0%
      Broomfield, CO69,444476.0%
      Westminster, CO114,8325816.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Springfield, IL115,0754020.0%
      The Woodlands, TX114,532524.0%
      West Jordan, UT115,181512.0%
      Carlsbad, CA114,4116428.0%
      Murrieta, CA114,0668978.0%
      Westminster, CO114,8325816.0%
      Source: The Westminster, CO 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.