Piatt County, IL Climate

Piatt County, IL is located in the Midwest region of the United States, and as such has a temperate climate with four distinct seasons. Winters are cold and snowfall is common, though temperatures generally remain above freezing. Spring brings mild temperatures with some precipitation throughout the season. Summers are warm and humid with occasional showers or thunderstorms. Fall usually brings cooling temperatures and less rain than springtime. Overall, Piatt County enjoys fairly mild weather year-round, with a milder winter than many other parts of the Midwest.

Piatt County, Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Piatt County averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 196 sunny days per year in Piatt County. The US average is 205 sunny days.

Piatt County gets some kind of precipitation, on average, 105 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 85 degrees
Winter Low: the January low is 17
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year

Bestplaces Comfort Index

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

8.5 Summer - 5.2 Winter

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

Climate	Piatt, Illinois	United States
	Unlock	38.1 in.
	15.3 in.	Unlock
	Unlock	106.2 days
	196 days	Unlock
	85.3°	85.8°
	Unlock	21.7°
	7.1	Unlock
	Unlock	4.3
	694 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 Piatt County with an average high temperature of 85.3°, which ranks it as about average compared to other places in Illinois. In Piatt County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Piatt County are September, May and June.

In Piatt County, there are 17.5 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 Piatt County with an average of 17.4°. This is about average compared to other places in Illinois.

In Piatt County, there are 120.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Piatt County, there are 5.6 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

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

May is the wettest month in Piatt County with 4.5 inches of rain, and the driest month is January with 2.0 inches. The wettest season is Autumn with 31% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 39.8 inches in Piatt County means that it is wetter than most places in Illinois.

May is the rainiest month in Piatt County with 11.3 days of rain, and September is the driest month with only 6.8 rainy days. There are 104.5 rainy days annually in Piatt County, 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 15.3 inches in Piatt County means that it is less snowy than most places in Illinois. January is the snowiest month in Piatt County with 4.9 inches of snow, and 5 months of the year have significant snowfall.

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