Zip 62539 (Illiopolis, IL) Climate

The climate in 62539 Illiopolis, IL is generally mild throughout the year. Summers are hot and humid with high temperatures averaging around 85°F while winters are cool and often cold with average temperatures of around 30°F. Rainfall is fairly consistent throughout the year with an average of around 41 inches annually which helps to keep the area green and lush during the warmer months. Snowfall can vary greatly from year to year but typically stays between 5-15 inches per season.

Illiopolis (zip 62539), Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Illiopolis (zip 62539) averages 16 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 198 sunny days per year in Illiopolis (zip 62539). The US average is 205 sunny days.

Illiopolis (zip 62539) gets some kind of precipitation, on average, 101 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 86 degrees
Winter Low: the January low is 19
Rain: averages 38 inches of rain a year
Snow: averages 16 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 62539 zip code is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

8.3 Summer - 5.3 Winter

September, June and May are the most pleasant months in the 62539 zip code, while January and December are the least comfortable months.

Climate	Illiopolis, Illinois	United States
	Unlock	38.1 in.
	15.6 in.	Unlock
	Unlock	106.2 days
	198 days	Unlock
	86.3°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	604 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 62539 zip code with an average high temperature of 86.3°, which ranks it as warmer than most places in Illinois. In the 62539 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 62539 zip code are September, May and June.

In the 62539 zip code, there are 22.8 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for the 62539 zip code with an average of 18.6°. This is warmer than most places in Illinois.

In the 62539 zip code, there are 114.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In the 62539 zip code, there are 5.0 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 62539 zip code 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 62539 zip code.

July is the wettest month in the 62539 zip code with 4.3 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.0 inches in the 62539 zip code means that it is drier than most places in Illinois.

May is the rainiest month in the 62539 zip code with 10.7 days of rain, and September is the driest month with only 6.8 rainy days. There are 101.4 rainy days annually in the 62539 zip code, 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 Spring with only a 23% chance of a rainy day.

An annual snowfall of 15.6 inches in the 62539 zip code means that it is less snowy than most places in Illinois. February is the snowiest month in the 62539 zip code with 4.6 inches of snow, and 4 months of the year have significant snowfall.

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