Perry County, IL Climate

Perry, IL County has a temperate climate with four distinct seasons. Summers in the area are usually hot and humid, with temperatures ranging from the upper 70s to mid 80s. Winters are generally cold and dry, with temperatures falling into the 20s and 30s during the coldest months. Spring and fall offer milder temperatures and a mix of rain and sunshine. The county averages about 40 inches of precipitation annually, mostly concentrated in the springtime months. Snowfall can vary greatly from year to year but is typically around 18 inches each season. Overall, Perry provides its residents with a pleasant climate throughout the year.

Perry County, Illinois gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Perry County averages 9 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 211 sunny days per year in Perry County. The US average is 205 sunny days.

Perry County gets some kind of precipitation, on average, 100 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 45 inches of rain a year
Snow: averages 9 inches of snow a year

Bestplaces Comfort Index

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

7.5 Summer - 5.7 Winter

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

Climate	Perry, Illinois	United States
	Unlock	38.1 in.
	9.3 in.	Unlock
	Unlock	106.2 days
	211 days	Unlock
	88.0°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	461 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 Perry County with an average high temperature of 88.0°, which ranks it as warmer than most places in Illinois. In Perry County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Perry County are May, September and June.

In Perry County, there are 32.2 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for Perry County with an average of 23.0°. This is one of the warmest places in Illinois.

In Perry County, there are 95.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Perry County, there are 1.9 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 Perry 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 Perry County.

May is the wettest month in Perry County with 5.5 inches of rain, and the driest month is February with 2.7 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 45.2 inches in Perry County means that it is one of the wettest places in Illinois.

May is the rainiest month in Perry County with 11.1 days of rain, and September is the driest month with only 6.4 rainy days. There are 99.8 rainy days annually in Perry 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 Winter with only a 23% chance of a rainy day.

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

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