McHenry, IL Weather - Forecast & Monthly Averages

TEMPERATURE	40
HUMIDITY	89
PRESSURE	102710
WIND COND.	300 7.6

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Weather Quick Facts

The highest monthly average temperature in McHenry for July is 72 degrees
The lowest monthly average temperature in McHenry for January is 23.8 degrees
The most monthly precipitation in McHenry occurs in June with 4.5 inches
The air quality index in McHenry is 7% better than the national average
The pollution index in McHenry is 80% better than the national average

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McHenry 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	33°F	25°F	1.5"
March	28°F	45°F	36°F	2.6"
April	37°F	57°F	46°F	4.1"
May	47°F	68°F	57°F	3.7"
June	57°F	77°F	67°F	4.5"
July	63°F	82°F	72°F	4.4"
August	62°F	80°F	71°F	3.7"
September	55°F	73°F	64°F	3.3"
October	44°F	62°F	52°F	3.4"
November	33°F	49°F	40°F	2.0"
December	22°F	36°F	29°F	2.5"

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McHenry 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	McHenry	Illinois	National
Air quality index	39	41	42
Pollution index	543,516	3,148,694	2,726,193

McHenry air quality

Measurement	Total
Days measured	203
Days with good air quality	174
Days with moderate air quality	28
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.004%
Carbon Tetrachloride	0.000%
Lead	0.000%
Mercury	0.000%

Average monthly McHenry temperature with heat index

McHenry monthly precipitation with daily maximum

McHenry monthly snow depth with daily maximum

McHenry monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Fontana-on-Geneva Lake, WI	1,518	37	26.0%
Greenwood, IL	352	37	26.0%
Hebron, IL	1,730	37	26.0%
Bloomfield, WI	4,725	37	26.0%
Lindenhurst, IL	14,317	39	22.0%
McHenry, IL	26,889	39	22.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Lindenhurst, NY	26,885	51	2.0%
Temple Terrace, FL	26,901	43	14.0%
Ilchester, MD	26,873	46	8.0%
Carrollton, GA	26,857	52	4.0%
Shoreview, MN	26,922	46	8.0%
McHenry, IL	26,889	39	22.0%

Source: The McHenry, 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.