Charleston, IL Weather


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The most pleasant months of the year for Charleston are September, May and June. In Charleston, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Charleston with an average high temperature of 86.2°, which ranks it as warmer than most places in Illinois. January is the snowiest month in Charleston with 6.2 inches of snow, and 4 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 - Charleston, IL

7 PM PST

Mostly Clear

56°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
TonightMostly Clear50° / 78°NNW 6 to 9 mph
Thursday NightShowers And Thunderstorms then Showers And Thunderstorms Likely47° / 58°W 8 to 17 mph
Friday NightMostly Cloudy44° / 56°NW 9 mph
Saturday NightMostly Cloudy37° / 56°NNW 7 to 14 mph
Sunday NightMostly Clear38° / 62°NNW 5 to 10 mph
Monday NightChance Rain Showers47° / 65°S 9 to 14 mph
Tuesday NightChance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms46° / 66°NW 10 to 16 mph

Weather Highlights

Summer High: the July high is around 86 degrees
Winter Low: the January low is 20
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Charleston area is 8.2 (10=best), which means it is more comfortable than most places in Illinois.

8.2 / 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
January35° 20°
February40° 24°
March52° 33°
April65° 44°
May74° 53°
June83° 63°
July86° 66°
August85° 64°
September79° 56°
October66° 45°
November52° 35°
December39° 24°
Hot, Freezing, Rainy, Snowy Days: Charleston
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02694
February02282
March015101
April03110
May10120
June40100
July7090
August6080
September2070
October0390
November012100
December023103

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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