Illinois 

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Weather in Illinois

The most pleasant months of the year for Illinois are September, June and May. In Illinois, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Illinois with an average high temperature of 85.6°, which ranks it as about average compared to other states. January is the snowiest month in Illinois with 6.8 inches of snow, and 5 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 - Illinois, IL

9 PM PST

Showers And Thunderstorms

62°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
TonightShowers And Thunderstorms57° / 68°ESE 8 to 13 mph
Monday NightShowers And Thunderstorms Likely58° / 69°ESE 16 mph
Tuesday NightShowers And Thunderstorms Likely61° / 80°SSE 15 mph
Wednesday NightChance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms64° / 84°S 14 to 17 mph
Thursday NightSlight Chance Showers And Thunderstorms then Mostly Cloudy64° / 85°S 12 to 15 mph
Friday NightSlight Chance Showers And Thunderstorms then Partly Cloudy63° / 85°SSW 10 to 14 mph
Saturday NightSlight Chance Showers And Thunderstorms then Partly Cloudy64° / 85°SW 9 to 14 mph

Weather Highlights

Summer High: the July high is around 86 degrees
Winter Low: the January low is 17
Rain: averages 40 inches of rain a year
Snow: averages 22 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Illinois area is 7.1 (10=best), which means it is more comfortable than most places in Illinois.

7.1 / 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
January34° 17°
February39° 21°
March50° 31°
April63° 41°
May73° 51°
June82° 61°
July86° 65°
August84° 63°
September78° 54°
October66° 43°
November51° 33°
December38° 22°
Hot, Freezing, Rainy, Snowy Days: Illinois
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02884
February02473
March018102
April05110
May10110
June40100
July8090
August6080
September2080
October0490
November01491
December02694

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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Reviews for Illinois    73 Reviews
Land of the tax now? - 7/14/2019
Born and raised in southern IL. 5 years ago this was a great state to live in, but we just recently elected a new government, I personally didn’t pay much attention... Read More

Start Your Review of Illinois


Peotone Ill - 8/21/2015
I have been in the town of peotone for 13 years and now selling! I have never seen a more poor excuse for a town. There is no were to go and nothing too do. The town... Read More

36 years here - 8/1/2015
I'm tired of everyone thinking chicago is all illinois is.... Even the politicians think only of Chicago... We have not had a state budget set yet amd people in small... Read More


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MAPS OF ILLINOIS
Illinois
ZIP CODES IN ILLINOIS
60629, 60618, 60632, 60639, 60623, 60647, 60804, 60617, 60625, 60608, ... 1384 more


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