Jersey, IL County has a humid continental climate, with hot summers and cold winters. Summers are characterized by high daytime temperatures, often reaching into the 90s (Fahrenheit), while nights tend to cool off substantially. Winters are marked by cold temperatures, frequent snowfall, and occasional extreme cold spells. The area tends to experience a moderate amount of precipitation throughout the year, usually in the form of rain or snow during the winter months. On average, Jersey County sees about 40 inches of annual snowfall and an average temperature of around 50°F annually.
Jersey County, Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Jersey County averages 15 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 202 sunny days per year in Jersey County. The US average is 205 sunny days.
Jersey 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 20
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year