Whiteside County, IL Climate

Whiteside County, IL has a continental type of climate with four distinct seasons. Summers in the county are hot and humid, while winters are cold and snowy. Spring and fall generally bring mild temperatures and plenty of precipitation. The county is known for its beautiful foliage in the fall months, as well as its bountiful wildflowers in the spring. Precipitation totals throughout the year average around 35 inches, but can vary greatly from year to year.

Whiteside County, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Whiteside County averages 30 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Whiteside County. The US average is 205 sunny days.

Whiteside County gets some kind of precipitation, on average, 101 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 13
Rain: averages 37 inches of rain a year
Snow: averages 30 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Whiteside County is 7.0 (10=best), which means it is about average compared to other places in Illinois.

8.9 Summer - 4.7 Winter

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

Climate	Whiteside, Illinois	United States
	36.9 in.	38.1 in.
	29.7 in.	27.8 in.
	100.9 days	106.2 days
	199 days	205 days
	84.6°	85.8°
	12.9°	21.7°
	7	7
	3.6	4.3
	656 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 Whiteside County with an average high temperature of 84.6°, which ranks it as cooler than most places in Illinois. In Whiteside County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Whiteside County are September, June and August.

In Whiteside County, there are 15.5 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

January has the coldest nighttime temperatures for Whiteside County with an average of 12.9°. This is colder than most places in Illinois.

In Whiteside County, there are 133.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Whiteside County, there are 12.6 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Illinois.

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

August is the wettest month in Whiteside County with 4.7 inches of rain, and the driest month is January with 1.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 36.9 inches in Whiteside County means that it is drier than most places in Illinois.

May is the rainiest month in Whiteside County with 10.6 days of rain, and February is the driest month with only 6.2 rainy days. There are 100.9 rainy days annually in Whiteside County, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 21% chance of a rainy day.

An annual snowfall of 29.7 inches in Whiteside County means that it is snowier than most places in Illinois. January is the snowiest month in Whiteside County with 9.8 inches of snow, and 6 months of the year have significant snowfall.

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