The climate in Decatur, IL (62522) is typical of the Midwest, with hot and humid summers and cold winters. July is typically the hottest month, with average high temperatures reaching nearly 90 degrees Fahrenheit and overnight lows rarely dipping below 70 degrees. January is usually the coldest month, when average highs reach the mid-30s and average lows drop to around 20 degrees. Overall, Decatur experiences four distinct seasons throughout the year. Precipitation is fairly consistent throughout the year with occasional snowfall in winter months.
Decatur (zip 62522), Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Decatur (zip 62522) averages 15 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 62522). The US average is 205 sunny days.
Decatur (zip 62522) 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 87 degrees
Winter Low: the January low is 19
Rain: averages 39 inches of rain a year
Snow: averages 15 inches of snow a year