McHenry County, Illinois 

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Weather in McHenry County, Illinois

The most pleasant months of the year for McHenry County are June, August and September. In McHenry County, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for McHenry County with an average high temperature of 82.7°, which ranks it as one of the coolest places in Illinois. January is the snowiest month in McHenry County with 10.8 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.


Today's Weather - McHenry, IL

12 AM PST

Sunny

26°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
This AfternoonSunny26° / 18°SW 10 mph
WednesdayCloudy31° / 28°SSW 15 mph
ThursdayChance Light Snow34° / 31°SSE 5 mph
FridayLight Snow Likely36° / 31°ENE 5 to 10 mph
SaturdayChance Light Snow36° / 27°N 10 mph
SundayPartly Sunny36° / 27°WNW 5 mph
MondayMostly Cloudy37° / 28°W 5 mph

Weather Highlights

Summer High: the July high is around 83 degrees
Winter Low: the January low is 13
Rain: averages 37 inches of rain a year
Snow: averages 35 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the McHenry County area is 6.8 (10=best), which means it is more comfortable than most places in Illinois.

6.8 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January29° 13°
February34° 17°
March45° 26°
April58° 37°
May69° 47°
June79° 57°
July83° 62°
August81° 60°
September74° 52°
October61° 40°
November47° 30°
December33° 18°
Hot, Freezing, Rainy, Snowy Days: McHenry
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January03097
February02685
March02393
April09111
May01120
June20110
July4090
August30100
September1090
October0690
November017101
December028106

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.


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MAPS OF MCHENRY COUNTY, ILLINOIS
ZIP CODES IN MCHENRY COUNTY, ILLINOIS
60014, 60102, 60098, 60050, 60156, 60142, 60013, 60051, 60033, 60152, ... 18 more

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