Lanark, IL Weather - Forecast & Monthly Averages

TEMPERATURE	35
HUMIDITY	89
PRESSURE	100640
WIND COND.	290 38.9

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Weather Quick Facts

The highest monthly average temperature in Lanark for July is 74 degrees
The lowest monthly average temperature in Lanark for January is 22.8 degrees
The most monthly precipitation in Lanark occurs in June with 8.9 inches
The air quality index in Lanark is equal to the national average
The pollution index in Lanark is 23% better than the national average

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Lanark 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	15°F	32°F	23°F	2.0"
February	16°F	34°F	25°F	2.7"
March	31°F	50°F	39°F	5.0"
April	41°F	64°F	51°F	6.5"
May	51°F	75°F	62°F	4.6"
June	61°F	83°F	71°F	8.9"
July	64°F	85°F	74°F	4.5"
August	61°F	83°F	72°F	4.9"
September	54°F	78°F	65°F	3.6"
October	43°F	64°F	53°F	3.1"
November	32°F	50°F	40°F	2.9"
December	20°F	35°F	28°F	4.0"

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Lanark 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	Lanark	Illinois	National
Air quality index	42	41	42
Pollution index	2,097,740	3,148,694	2,726,193

Lanark air quality

Measurement	Total
Days measured	364
Days with good air quality	268
Days with moderate air quality	96
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.060%
Carbon Tetrachloride	0.000%
Lead	0.001%
Mercury	0.300%

Average monthly Lanark temperature with heat index

Lanark monthly precipitation with daily maximum

Lanark monthly snow depth with daily maximum

Lanark monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Thomson, IL	369	42	16.0%
Chadwick, IL	529	42	16.0%
Freeport, IL	23,930	42	16.0%
Forreston, IL	1,392	42	16.0%
Coleta, IL	230	42	16.0%
Lanark, IL	1,453	42	16.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Odon, IN	1,453	1	98.0%
Silver Lake, KS	1,453	41	18.0%
Morrice, MI	1,453	36	28.0%
North Bend, NE	1,453	40	20.0%
Hughestown, PA	1,453	38	24.0%
Lanark, IL	1,453	42	16.0%

Source: The Lanark, 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.