Peoria County, IL Climate

Peoria, IL County is located in the Midwest region of the United States, and as such experiences warm summers and cold winters. During the summer months, temperatures average around 77 degrees Fahrenheit with occasional spikes into the low 90s. Winters are cold, with temperatures typically ranging from 20 to 40 degrees Fahrenheit. The area receives a fair amount of snow each winter season, totaling up to about 29 inches annually. Precipitation is evenly distributed throughout the year, with an average of 47 inches per year. Overall, Peoria has a pleasant climate that allows for enjoyable outdoor activities throughout most of the year.

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

Peoria County averages 22 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 192 sunny days per year in Peoria County. The US average is 205 sunny days.

Peoria County gets some kind of precipitation, on average, 108 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 16
Rain: averages 38 inches of rain a year
Snow: averages 22 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Peoria County is 7.1 (10=best), which means it is more comfortable than most places in Illinois.

8.6 Summer - 5 Winter

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

Climate	Peoria, Illinois	United States
	38.0 in.	38.1 in.
	22.4 in.	27.8 in.
	107.8 days	106.2 days
	192 days	205 days
	85.6°	85.8°
	15.7°	21.7°
	7.1	7
	3.8	4.3
	645 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 Peoria County with an average high temperature of 85.6°, which ranks it as about average compared to other places in Illinois. In Peoria County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Peoria County are September, June and May.

In Peoria County, there are 19.6 days annually when the high temperature is over 90°, which is about average compared to other places in Illinois.

January has the coldest nighttime temperatures for Peoria County with an average of 15.7°. This is colder than most places in Illinois.

In Peoria County, there are 124.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Peoria County, there are 8.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

The humidity is usually comfortable in Peoria County but some summer months can be unpleasant. July is the most humid month, though humidity is low for most of the year. The most humid months in Peoria County are July, August and June.

May is the wettest month in Peoria County with 4.5 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 31% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.0 inches in Peoria County means that it is drier than most places in Illinois.

May is the rainiest month in Peoria County with 11.5 days of rain, and February is the driest month with only 7.1 rainy days. There are 107.8 rainy days annually in Peoria County, which is about average compared to other places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 22.4 inches in Peoria County means that it is about average compared to other places in Illinois. January is the snowiest month in Peoria County with 6.8 inches of snow, and 6 months of the year have significant snowfall.

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