TODAY AUG19
TEMPERATURE86
HUMIDITY48
PRESSURE29.96
WIND COND.170 5.8
  • 8166Mon60%80%
  • 7757Tue50%30%
  • 7655Wed
  • 7960Thu
  • 7864Fri
daynightWeather update from Chicago / West Chicago, Dupage Airport at

Carol Stream Average Weather

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"

Did you know?

  • 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 20% worse than the national average.
  • The pollution index in Carol Stream is 195% worse than the national average.

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Compare Carol Stream, IL Weather To Other Cities

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 index604150
Pollution index14,981,3003,347,2955,066,862

Carol Stream air quality information

MeasurementTotal
Days measured365
Days with good air quality72
Days with moderate air quality281
Days w/ poor A.Q. for sensitive groups11
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.
Montgomery, IL19,055198%
Prestbury, IL1,780198%
Gilberts, IL7,4793138%
Arlington Heights, IL75,7216020%
Bellwood, IL19,1466020%
Carol Stream, IL40,2286020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Marana, AZ40,221468%
San Gabriel, CA40,2007448%
Hickory, NC40,2743824%
Holyoke, MA40,2803922%
Hagerstown, MD40,3254118%
Carol Stream, IL40,2286020%
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.