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

6 AM PST

Slight Chance Showers And Thunderstorms

77°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
TodaySlight Chance Showers And Thunderstorms87° / 72°W 9 mph
ThursdayChance Showers And Thunderstorms87° / 70°SW 6 to 9 mph
FridayShowers And Thunderstorms Likely82° / 63°NE 6 to 13 mph
SaturdaySlight Chance Rain Showers then Sunny79° / 58°NE 8 to 14 mph
SundaySunny81° / 62°ESE 6 to 9 mph
MondayMostly Sunny87° / 66°SW 7 to 13 mph
TuesdaySunny then Slight Chance Rain Showers84° / 63°WNW 6 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 8.4 (10=best), which means it is more comfortable than most places in Illinois.

8.4 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. 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    77 Reviews
Miserable - 11/4/2021
Dont move to Illinois, I moved here over 11 years ago, I was shocked to find out how rude and whiny people are that live here, the mid west was suppose to be such a good... Read More

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Just to set the record straight - 9/28/2021
I just want to say being a resident in Illinois for over 50 years, if you are a fairly hard working person of average intelligence, Illinois is probably one of the best... Read More

Taxes and fees are killing me - 7/5/2021
I have lived in illinois my whole life (31years) and the ever increasing taxes and fees are killing me. Rent keeps on going up because of all the tax increases every... Read More


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


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