Carol Stream, IL Weather - Forecast & Monthly Averages

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TEMPERATURE	34
HUMIDITY	67
PRESSURE	30.31
WIND COND.	30 18.4

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

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	16°F	32°F	24°F	1.4"
February	17°F	34°F	25°F	1.2"
March	30°F	49°F	38°F	2.2"
April	39°F	62°F	50°F	3.8"
May	49°F	73°F	60°F	4.5"
June	59°F	82°F	70°F	4.4"
July	63°F	85°F	74°F	4.1"
August	62°F	83°F	72°F	3.8"
September	54°F	77°F	65°F	3.4"
October	43°F	64°F	53°F	3.1"
November	32°F	50°F	40°F	1.9"
December	21°F	36°F	29°F	2.1"

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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.
Index	Carol Stream	Illinois	National
Air quality index	55	41	50
Pollution index	14,981,300	3,347,295	5,066,862

Carol Stream air quality information

Measurement	Total
Days measured	365
Days with good air quality	121
Days with moderate air quality	227
Days w/ poor A.Q. for sensitive groups	16
Days with unhealthy air quality	1

Carol Stream air quality information

Pollutant	Total
Arsenic	0.010%
Benzene	0.140%
Carbon Tetrachloride	0.030%
Lead	0.020%
Mercury	0.010%

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, State	Population	Air Quality Index	National Avg.
Prestbury, IL	1,780	0	100%
Montgomery, IL	19,055	0	100%
Gilberts, IL	7,479	42	16%
East Dundee, IL	3,125	55	10%
Sleepy Hollow, IL	3,338	55	10%
Carol Stream, IL	40,228	55	10%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
Marana, AZ	40,221	47	6%
San Gabriel, CA	40,200	72	44%
Hickory, NC	40,274	43	14%
Holyoke, MA	40,280	40	20%
Hagerstown, MD	40,325	40	20%
Carol Stream, IL	40,228	55	10%

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.