Oak Brook, IL Weather - Forecast & Monthly Averages

TEMPERATURE	58
HUMIDITY	72
PRESSURE	101220
WIND COND.	220 18.4

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Weather Quick Facts

The highest monthly average temperature in Oak Brook for July is 76.3 degrees
The lowest monthly average temperature in Oak Brook for January is 26.2 degrees
The most monthly precipitation in Oak Brook occurs in August with 5.1 inches
The air quality index in Oak Brook is 31% worse than the national average
The pollution index in Oak Brook is 450% worse than the national average

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Oak Brook 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	20°F	34°F	26°F	1.9"
February	21°F	36°F	28°F	1.6"
March	33°F	49°F	40°F	2.4"
April	42°F	62°F	51°F	3.6"
May	52°F	73°F	61°F	4.3"
June	63°F	82°F	72°F	4.6"
July	68°F	86°F	76°F	3.5"
August	67°F	83°F	75°F	5.1"
September	60°F	77°F	68°F	2.8"
October	48°F	65°F	55°F	3.9"
November	36°F	51°F	43°F	2.2"
December	25°F	37°F	31°F	2.2"

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Oak Brook 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	Oak Brook	Illinois	National
Air quality index	55	41	42
Pollution index	14,981,300	3,148,694	2,726,193

Oak Brook air quality

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

Air quality details

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

Average monthly Oak Brook temperature with heat index

Oak Brook monthly precipitation with daily maximum

Oak Brook monthly snow depth with daily maximum

Oak Brook monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Bedford Park, IL	669	55	10.0%
Cicero, IL	81,471	55	10.0%
Oak Park, IL	52,102	55	10.0%
Burbank, IL	28,447	55	10.0%
Hometown, IL	4,216	55	10.0%
Oak Brook, IL	8,085	55	10.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Ellsworth, ME	8,085	31	38.0%
Garden City Park, NY	8,087	51	2.0%
Bel Aire, KS	8,082	40	20.0%
Northfield, NJ	8,088	37	26.0%
Bellevue, PA	8,088	56	12.0%
Oak Brook, IL	8,085	55	10.0%

Source: The Oak Brook, 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.