Charleston-Mattoon Metro Area, IL Climate

The climate in the Charleston-Mattoon, IL Metro Area is temperate and humid, with cold winters and hot summers. The average yearly temperature is around 54°F (12°C). Summers are usually hot and humid, with temperatures reaching the high 80s (30s Celsius) in July and August. Winters tend to be very cold, with temperatures dropping into the teens (-7 to -1 C). Precipitation levels are relatively consistent throughout the year, averaging around 43 inches (109 cm). Overall, Charleston-Mattoon is a great place to live for those who enjoy mild winters and warm summers.

Charleston-Mattoon Metro Area, Illinois gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Charleston-Mattoon Metro Area averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 200 sunny days per year in Charleston-Mattoon Metro Area. The US average is 205 sunny days.

Charleston-Mattoon Metro Area gets some kind of precipitation, on average, 109 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 20
Rain: averages 41 inches of rain a year
Snow: averages 15 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the Charleston-Mattoon metro area is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

8.2 Summer - 5.3 Winter

September, May and June are the most pleasant months in the Charleston-Mattoon metro area, while January and December are the least comfortable months.

Climate	Charleston-Mattoon, Illinois	United States
	Unlock	38.1 in.
	15.3 in.	Unlock
	Unlock	106.2 days
	200 days	Unlock
	86.5°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	638 ft.	Unlock

Climate

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.

July is the hottest month for the Charleston-Mattoon metro area with an average high temperature of 86.5°, which ranks it as warmer than most places in Illinois. In the Charleston-Mattoon metro area, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the Charleston-Mattoon metro area are September, May and June.

In the Charleston-Mattoon metro area, there are 21.3 days annually when the high temperature is over 90°, which is about average compared to other places in Illinois.

January has the coldest nighttime temperatures for the Charleston-Mattoon metro area with an average of 20.0°. This is warmer than most places in Illinois.

In the Charleston-Mattoon metro area, there are 105.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In the Charleston-Mattoon metro area, there are 3.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

The humidity can be uncomfortably heavy or close in the Charleston-Mattoon metro area during the summer months. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most humid months in the Charleston-Mattoon metro area.

May is the wettest month in the Charleston-Mattoon metro area with 4.5 inches of rain, and the driest month is February with 2.2 inches. The wettest season is Autumn with 28% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 41.3 inches in the Charleston-Mattoon metro area means that it is wetter than most places in Illinois.

May is the rainiest month in the Charleston-Mattoon metro area with 11.5 days of rain, and September is the driest month with only 6.9 rainy days. There are 108.5 rainy days annually in the Charleston-Mattoon metro area, which is about average compared to other places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 15.3 inches in the Charleston-Mattoon metro area means that it is less snowy than most places in Illinois. January is the snowiest month in the Charleston-Mattoon metro area with 6.0 inches of snow, and 5 months of the year have significant snowfall.

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