Clinton County, IL Climate

Clinton, IL County is located in the Midwestern United States and has a humid continental climate. This type of climate is characterized by hot summers and cold winters with an average temperature range of 25-85 degrees Fahrenheit. Summers are usually hot and humid with temperatures reaching over 90 degrees Fahrenheit during the day. Winters are typically cold with temperatures dropping below freezing for weeks at a time. Overall, Clinton, IL County has a mild climate overall, making it an ideal place to settle down for those looking for a temperate living environment.

Clinton County, Illinois gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Clinton County averages 11 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 Clinton County. The US average is 205 sunny days.

Clinton County gets some kind of precipitation, on average, 96 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 21
Rain: averages 42 inches of rain a year
Snow: averages 11 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Clinton County is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

7.6 Summer - 5.7 Winter

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

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

In Clinton County, there are 32.5 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for Clinton County with an average of 21.2°. This is warmer than most places in Illinois.

In Clinton County, there are 102.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Clinton County, there are 2.6 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 Clinton 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 Clinton County.

May is the wettest month in Clinton County with 4.8 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 29% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 42.0 inches in Clinton County means that it is wetter than most places in Illinois.

May is the rainiest month in Clinton County with 10.4 days of rain, and September is the driest month with only 6.4 rainy days. There are 96.3 rainy days annually in Clinton County, which is one of the least rainy places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 23% chance of a rainy day.

An annual snowfall of 10.7 inches in Clinton County means that it is one of the least snowy places in Illinois. January is the snowiest month in Clinton County with 3.6 inches of snow, and 4 months of the year have significant snowfall.

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