Douglas County, IL Climate

Douglas, IL County has a humid continental climate, characterized by hot summers and cold winters. The average high temperature in the summer reaches into the low to mid-80s, while the wintertime lows can dip into the single digits. Precipitation levels are fairly consistent throughout the year, averaging around 41 inches per year. snowfall is heavy in some years, usually accumulating to around 18 inches on average. Due to its location in Central Illinois, Douglas County experiences frequent thunderstorms during the summer months, with an average of about 41 storms each year. Overall, Douglas County enjoys four distinct seasons that bring mild temperatures and plenty of precipitation for residents to enjoy.

Douglas County, Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Douglas County averages 17 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 196 sunny days per year in Douglas County. The US average is 205 sunny days.

Douglas County gets some kind of precipitation, on average, 104 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 85 degrees
Winter Low: the January low is 18
Rain: averages 40 inches of rain a year
Snow: averages 17 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Douglas County is 7.1 (10=best), which means it is more comfortable than most places in Illinois.

8.5 Summer - 5.1 Winter

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

Climate	Douglas, Illinois	United States
	40.4 in.	38.1 in.
	16.9 in.	27.8 in.
	103.5 days	106.2 days
	196 days	205 days
	85.3°	85.8°
	17.7°	21.7°
	7.1	7
	3.9	4.3
	659 ft.	2443 ft.

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 Douglas County with an average high temperature of 85.3°, which ranks it as about average compared to other places in Illinois. In Douglas County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Douglas County are September, May and June.

In Douglas County, there are 17.8 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 Douglas County with an average of 17.7°. This is about average compared to other places in Illinois.

In Douglas County, there are 118.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Douglas County, there are 5.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

The humidity can be uncomfortably heavy or close in Douglas 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 Douglas County.

July is the wettest month in Douglas County with 4.5 inches of rain, and the driest month is January with 2.1 inches. The wettest season is Autumn with 30% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 40.4 inches in Douglas County means that it is wetter than most places in Illinois.

May is the rainiest month in Douglas County with 10.9 days of rain, and September is the driest month with only 6.8 rainy days. There are 103.5 rainy days annually in Douglas County, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 16.9 inches in Douglas County means that it is less snowy than most places in Illinois. January is the snowiest month in Douglas County with 6.4 inches of snow, and 5 months of the year have significant snowfall.

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