The climate in Decatur, IL (62521) is a humid continental climate with four distinct seasons. Summers are hot and humid with average highs reaching into the mid-80s and lows in the mid-60s; while winters are cold but not terribly extreme, with highs typically hovering around the freezing mark and lows in the teens. Precipitation is relatively abundant year round, usually falling in moderate showers or thunderstorms. The area experiences all four seasons, giving it a varied climate throughout the year.
Decatur (zip 62521), Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Decatur (zip 62521) averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 198 sunny days per year in Decatur (zip 62521). The US average is 205 sunny days.
Decatur (zip 62521) 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 87 degrees
Winter Low: the January low is 19
Rain: averages 39 inches of rain a year
Snow: averages 12 inches of snow a year