Calhoun County, IL Climate

Calhoun County is located in southwestern Illinois and has a humid continental climate. Summers are generally hot and humid, with temperatures reaching as high as 90 degrees Fahrenheit. Winters are cold with the occasional snowfall, with temperatures typically ranging between 10 to 25 degrees Fahrenheit. Rainfall is fairly consistent throughout the year, averaging 41 inches annually. Spring and fall tend to be mild and pleasant, making those seasons ideal times of year for outdoor activities.

Calhoun County, Illinois gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Calhoun County averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Calhoun County. The US average is 205 sunny days.

Calhoun County gets some kind of precipitation, on average, 102 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 88 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 Calhoun County is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

7.9 Summer - 5.5 Winter

September, May and June are the most pleasant months in Calhoun County, while January and December are the least comfortable months.

Climate	Calhoun, Illinois	United States
	Unlock	38.1 in.
	14.7 in.	Unlock
	Unlock	106.2 days
	202 days	Unlock
	88.1°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	556 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 Calhoun County with an average high temperature of 88.1°, which ranks it as warmer than most places in Illinois. In Calhoun County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Calhoun County are September, May and June.

In Calhoun County, there are 32.3 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for Calhoun County with an average of 19.9°. This is warmer than most places in Illinois.

In Calhoun County, there are 106.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Calhoun County, there are 3.6 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 Calhoun County 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 Calhoun County.

May is the wettest month in Calhoun County with 4.6 inches of rain, and the driest month is January with 2.2 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 40.5 inches in Calhoun County means that it is wetter than most places in Illinois.

May is the rainiest month in Calhoun County with 11.2 days of rain, and January is the driest month with only 7.1 rainy days. There are 102.4 rainy days annually in Calhoun County, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 14.7 inches in Calhoun County means that it is less snowy than most places in Illinois. January is the snowiest month in Calhoun County with 4.5 inches of snow, and 5 months of the year have significant snowfall.

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