Mount Vernon Metro Area, IL Climate

The Mount Vernon, IL Metro Area has a humid subtropical climate with hot, humid summers and mild winters. The area receives an average of 42 inches of rainfall each year, making it one of the wettest cities in Illinois. During the summer months, temperatures can reach mid to upper 90s during the day and drop to lower 70s at night. Winters are mild with temperatures typically ranging from the mid-30s during the day and dropping to 20°F or lower at night. Snowfall is usually light to moderate with an average of 11 inches per year. Overall, the climate is fairly mild and pleasant throughout most of the year.

Mount Vernon Metro Area, Illinois gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Mount Vernon Metro Area averages 9 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 203 sunny days per year in Mount Vernon Metro Area. The US average is 205 sunny days.

Mount Vernon Metro Area 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 22
Rain: averages 44 inches of rain a year
Snow: averages 9 inches of snow a year

Bestplaces Comfort Index

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

7.8 Summer - 5.6 Winter

September, May and June are the most pleasant months in the Mount Vernon metro area, while January and December are the least comfortable months.

Climate	Mount Vernon, Illinois	United States
	44.0 in.	38.1 in.
	9.3 in.	27.8 in.
	99.2 days	106.2 days
	203 days	205 days
	87.6°	85.8°
	21.8°	21.7°
	7.2	7
	4.2	4.3
	464 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 the Mount Vernon metro area with an average high temperature of 87.6°, which ranks it as warmer than most places in Illinois. In the Mount Vernon metro area, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the Mount Vernon metro area are September, May and June.

In the Mount Vernon metro area, there are 29.4 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 Mount Vernon metro area with an average of 21.8°. This is warmer than most places in Illinois.

In the Mount Vernon metro area, there are 101.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In the Mount Vernon metro area, there are 2.4 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 Mount Vernon metro area 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 Mount Vernon metro area.

May is the wettest month in the Mount Vernon metro area with 5.2 inches of rain, and the driest month is January with 2.6 inches. The wettest season is Summer with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 44.0 inches in the Mount Vernon metro area means that it is wetter than most places in Illinois.

May is the rainiest month in the Mount Vernon metro area with 10.7 days of rain, and September is the driest month with only 6.3 rainy days. There are 99.2 rainy days annually in the Mount Vernon metro area, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 9.3 inches in the Mount Vernon metro area means that it is one of the least snowy places in Illinois. January is the snowiest month in the Mount Vernon metro area with 2.8 inches of snow, and 4 months of the year have significant snowfall.

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