TODAY NOV21
TEMPERATURE30
HUMIDITY85
PRESSURE100480
WIND COND.260 29.5
  • 4632Fri
  • 4433Sat
  • 4941Sun
  • 4826Mon
  • 3624Tue
daynightWeather update from Chicago / West Chicago, Dupage Airport at
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Weather Quick Facts

  • The highest monthly average temperature in West Chicago for August is 73.7 degrees
  • The lowest monthly average temperature in West Chicago for February is 24.4 degrees
  • The most monthly precipitation in West Chicago occurs in August with 8.3 inches
  • The air quality index in West Chicago is 31% worse than the national average
  • The pollution index in West Chicago is 450% worse than the national average

Compare West Chicago, IL Weather

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      West Chicago 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
      January20°F33°F26°F3.6"
      February18°F32°F24°F3.0"
      March30°F49°F39°F3.1"
      April39°F62°F49°F5.2"
      May49°F72°F60°F3.7"
      June60°F83°F72°F4.9"
      July62°F84°F73°F7.8"
      August64°F84°F74°F8.3"
      September56°F80°F68°F2.9"
      October47°F67°F56°F4.3"
      November32°F50°F40°F3.1"
      December18°F32°F25°F2.2"

      West Chicago 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.
      IndexWest ChicagoIllinoisNational
      Air quality index554142
      Pollution index14,981,3003,148,6942,726,193

      West Chicago air quality

      MeasurementTotal
      Days measured365
      Days with good air quality121
      Days with moderate air quality227
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.140%
      Carbon Tetrachloride0.030%
      Lead0.020%
      Mercury0.010%

      Average monthly West Chicago temperature with heat index

      West Chicago monthly precipitation with daily maximum

      West Chicago monthly snow depth with daily maximum

      West Chicago monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Oswego, IL35,4700100.0%
      Prestbury, IL1,9780100.0%
      Montgomery, IL19,5150100.0%
      Sugar Grove, IL9,7560100.0%
      Pingree Grove, IL8,7684216.0%
      West Chicago, IL26,9985510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Maryland Heights, MO26,996548.0%
      New London, CT27,0013726.0%
      Mount Pleasant, WI27,0083922.0%
      Norco, CA27,0218978.0%
      Bristol, TN26,9734510.0%
      West Chicago, IL26,9985510.0%
      Source: The West Chicago, IL 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.