Randolph County, IL Climate

Randolph County, IL has a humid continental climate, with cold winters and hot, humid summers. Winters in Randolph are characterized by temperatures that average around 28°F to 35°F and can drop even lower during the night. Summers are usually hot and muggy, with temperatures averaging between 70°F and 80°F. The area experiences frequent rainfall throughout the year, with an average of 45 inches of rain per year. Snowfall is also common during winter months. The spring months bring mild weather and blooming flowers which are followed by the hot summer months.

Randolph County, Illinois gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Randolph County averages 10 inches of snow per year. The US average is 28 inches of snow per year.

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

Randolph County gets some kind of precipitation, on average, 97 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 89 degrees
Winter Low: the January low is 22
Rain: averages 44 inches of rain a year
Snow: averages 10 inches of snow a year

Bestplaces Comfort Index

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

7.4 Summer - 5.7 Winter

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

Climate	Randolph, Illinois	United States
	Unlock	38.1 in.
	9.8 in.	Unlock
	Unlock	106.2 days
	205 days	Unlock
	88.8°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	464 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 Randolph County with an average high temperature of 88.8°, which ranks it as one of the hottest places in Illinois. In Randolph County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Randolph County are May, September and June.

In Randolph County, there are 37.3 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

January has the coldest nighttime temperatures for Randolph County with an average of 22.2°. This is warmer than most places in Illinois.

In Randolph County, there are 100.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Randolph County, there are 2.3 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 Randolph 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 Randolph County.

May is the wettest month in Randolph County with 5.3 inches of rain, and the driest month is January with 2.5 inches. The wettest season is Summer with 30% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 43.7 inches in Randolph County means that it is wetter than most places in Illinois.

May is the rainiest month in Randolph County with 10.8 days of rain, and January is the driest month with only 6.5 rainy days. There are 96.7 rainy days annually in Randolph County, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 9.8 inches in Randolph County means that it is one of the least snowy places in Illinois. February is the snowiest month in Randolph County with 3.2 inches of snow, and 4 months of the year have significant snowfall.

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