Madison County, IL has a humid continental climate which features hot summers and cold winters. The average annual temperature is around 51°F and the typical precipitation is around 40 inches. Winters are usually cold with temperatures rarely falling below 0°F, while summers are warm with temperatures often reaching up to 90°F. Snowfall can be expected in the winter months, while spring and fall have mild temperatures. Madison County experiences all four seasons and generally enjoys mild weather conditions throughout the year.
Madison County, Illinois gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Madison County averages 13 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 Madison County. The US average is 205 sunny days.
Madison County gets some kind of precipitation, on average, 99 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 89 degrees
Winter Low: the January low is 22
Rain: averages 42 inches of rain a year
Snow: averages 13 inches of snow a year