Lanark, IL Weather Forecast & Monthly Average Temperatures

TEMPERATURE	33
HUMIDITY	81
PRESSURE	30.06
WIND COND.	290 11.4

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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"

Did you know?

The highest monthly average temperature in Lanark for July is 74 degrees.
The lowest monthly average temperature in Lanark for January is 23 degrees.
The most monthly precipitation in Lanark occurs in June with 8.9 inches.
The air quality index in Lanark is 6% worse than the national average.
The pollution index in Lanark is 58% better than the national average.

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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	53	41	50
Pollution index	2,097,740	3,347,295	5,066,862

Lanark air quality information

Measurement	Total
Days measured	365
Days with good air quality	158
Days with moderate air quality	204
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality

Lanark air quality information

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, State	Population	Air Quality Index	National Avg.
Forreston, IL	1,771	31	38%
Freeport, IL	24,784	31	38%
Polo, IL	2,131	31	38%
Chadwick, IL	581	53	6%
Milledgeville, IL	1,052	53	6%
Lanark, IL	1,542	53	6%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
Union Point, GA	1,542	39	22%
Hancock, MD	1,542	41	18%
Woodacre, CA	1,542	43	14%
Paradis, LA	1,542	34	32%
Nicholson, GA	1,542	39	22%
Lanark, IL	1,542	53	6%

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.