Jackson County, IL Climate

Jackson, IL County has a mild climate year round. The summers are generally hot and humid, with temperatures reaching up to 90°F. Winters are relatively mild, with average temperatures hovering around 36°F. The area receives an average of 47 inches of rain per year, which helps to keep the area green and lush. Snowfall is generally light in comparison to other areas in Illinois, with an average of 16 inches per year. This region is known for its temperate weather, making it an ideal spot for outdoor activities throughout the year.

Jackson County, Illinois gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 213 sunny days per year in Jackson County. The US average is 205 sunny days.

Jackson 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 89 degrees
Winter Low: the January low is 24
Rain: averages 46 inches of rain a year
Snow: averages 10 inches of snow a year

Bestplaces Comfort Index

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

Climate	Jackson, Illinois	United States
	45.5 in.	38.1 in.
	10.1 in.	27.8 in.
	98.6 days	106.2 days
	213 days	205 days
	88.6°	85.8°
	23.5°	21.7°
	7.2	7
	4.3	4.3
	452 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 Jackson County with an average high temperature of 88.6°, which ranks it as one of the hottest places in Illinois. In Jackson County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jackson County are May, September and June.

In Jackson County, there are 34.9 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 Jackson County with an average of 23.5°. This is one of the warmest places in Illinois.

In Jackson County, there are 95.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Jackson County, there are 1.5 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

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

May is the wettest month in Jackson County with 5.3 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 30% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 45.5 inches in Jackson County means that it is one of the wettest places in Illinois.

May is the rainiest month in Jackson County with 10.7 days of rain, and September is the driest month with only 6.4 rainy days. There are 98.6 rainy days annually in Jackson 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 Autumn with only a 23% chance of a rainy day.

An annual snowfall of 10.1 inches in Jackson County means that it is one of the least snowy places in Illinois. February is the snowiest month in Jackson County with 3.0 inches of snow, and 4 months of the year have significant snowfall.

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