Darien, IL Weather - Forecast & Monthly Averages

TEMPERATURE	50
HUMIDITY	100
PRESSURE	100750
WIND COND.	210 27.7

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Weather Quick Facts

The highest monthly average temperature in Darien for July is 73.4 degrees
The lowest monthly average temperature in Darien for January is 24.4 degrees
The most monthly precipitation in Darien occurs in August with 7.7 inches
The air quality index in Darien is 31% worse than the national average
The pollution index in Darien is 450% worse than the national average

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Darien 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	17°F	32°F	24°F	3.1"
February	18°F	34°F	26°F	3.0"
March	31°F	49°F	39°F	5.2"
April	40°F	62°F	50°F	4.8"
May	51°F	73°F	61°F	5.9"
June	60°F	82°F	70°F	6.7"
July	64°F	84°F	73°F	4.1"
August	62°F	82°F	71°F	7.7"
September	55°F	76°F	65°F	3.2"
October	44°F	64°F	53°F	7.3"
November	33°F	50°F	41°F	3.9"
December	22°F	36°F	29°F	3.7"

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

Darien 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 Darien temperature with heat index

Darien monthly precipitation with daily maximum

Darien monthly snow depth with daily maximum

Darien monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Berwyn, IL	54,850	55	10.0%
Elmwood Park, IL	24,274	55	10.0%
Stickney, IL	6,607	55	10.0%
Burbank, IL	28,447	55	10.0%
Midlothian, IL	14,464	55	10.0%
Darien, IL	21,843	55	10.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Geneva, IL	21,843	55	10.0%
Linda, CA	21,842	44	12.0%
Shelbyville, TN	21,841	31	38.0%
Rose Hill, VA	21,846	47	6.0%
Lexington, SC	21,847	43	14.0%
Darien, IL	21,843	55	10.0%

Source: The Darien, 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.