TODAY MAR04
TEMPERATURE34
HUMIDITY67
PRESSURE30.31
WIND COND.30 18.4
  • 4525Fri
  • 4627Sat
  • 5440Sun
  • 5841Mon
  • 6150Tue
daynightWeather update from Chicago / West Chicago, Dupage Airport at

Key findings

  • The highest monthly average temperature in Carol Stream for July is 74 degrees
  • The lowest monthly average temperature in Carol Stream for January is 24 degrees
  • The most monthly precipitation in Carol Stream occurs in May with 4.5 inches
  • The air quality index in Carol Stream is 11% worse than the national average
  • The pollution index in Carol Stream is 196% worse than the national average

Compare Carol Stream, IL Weather

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      Carol Stream 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
      January16°F32°F24°F1.4"
      February17°F34°F25°F1.2"
      March30°F49°F38°F2.2"
      April39°F62°F50°F3.8"
      May49°F73°F60°F4.5"
      June59°F82°F70°F4.4"
      July63°F85°F74°F4.1"
      August62°F83°F72°F3.8"
      September54°F77°F65°F3.4"
      October43°F64°F53°F3.1"
      November32°F50°F40°F1.9"
      December21°F36°F29°F2.1"

      Carol Stream 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.
      IndexCarol StreamIllinoisNational
      Air quality index554150
      Pollution index14,981,3003,347,2955,066,862

      Carol Stream air quality information

      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

      Carol Stream air quality information

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

      Average monthly Carol Stream temperature with heat index

      Carol Stream monthly precipitation with daily maximum

      Carol Stream monthly snow depth with daily maximum

      Carol Stream monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Prestbury, IL1,7800100%
      Montgomery, IL19,0550100%
      Gilberts, IL7,4794216%
      East Dundee, IL3,1255510%
      Sleepy Hollow, IL3,3385510%
      Carol Stream, IL40,2285510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Marana, AZ40,221476%
      San Gabriel, CA40,2007244%
      Hickory, NC40,2744314%
      Holyoke, MA40,2804020%
      Hagerstown, MD40,3254020%
      Carol Stream, IL40,2285510%
      Source: The Carol Stream, 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.