Monroe County, IL Climate

Monroe County, IL boasts a humid continental climate with hot and humid summers and cold, snowy winters. The average temperature in the summer months is around 75 degrees Fahrenheit, while in the winter it can drop to an average of 30 degrees Fahrenheit. Rainfall is spread out throughout the year with most of it occurring during the spring and summer months. Additionally, the county gets an average of 27 inches of snow each year. Winters tend to be particularly harsh with strong winds and blizzards possible.

Monroe County, Illinois gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Monroe County averages 12 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 Monroe County. The US average is 205 sunny days.

Monroe County gets some kind of precipitation, on average, 99 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 23
Rain: averages 43 inches of rain a year
Snow: averages 12 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Monroe 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 Monroe County, while January and December are the least comfortable months.

Climate	Monroe, Illinois	United States
	42.8 in.	38.1 in.
	11.5 in.	27.8 in.
	98.9 days	106.2 days
	202 days	205 days
	88.4°	85.8°
	22.5°	21.7°
	7.2	7
	4.2	4.3
	509 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 Monroe County with an average high temperature of 88.4°, which ranks it as one of the hottest places in Illinois. In Monroe County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Monroe County are May, September and June.

In Monroe County, there are 35.6 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 Monroe County with an average of 22.5°. This is one of the warmest places in Illinois.

In Monroe County, there are 96.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Monroe County, there are 2.0 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 Monroe 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 Monroe County.

May is the wettest month in Monroe County with 4.9 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 42.8 inches in Monroe County means that it is wetter than most places in Illinois.

May is the rainiest month in Monroe County with 11.0 days of rain, and February is the driest month with only 6.7 rainy days. There are 98.9 rainy days annually in Monroe 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 11.5 inches in Monroe County means that it is less snowy than most places in Illinois. January is the snowiest month in Monroe County with 3.7 inches of snow, and 4 months of the year have significant snowfall.

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