Marion, IL has a humid continental climate, with hot summers and cold winters. In the summer months, temperatures typically reach into the mid-80s with high humidity levels. The winter months tend to be colder and can get down to freezing or below. Precipitation is fairly evenly distributed throughout the year, with occasional snowfall in winter months. Overall, Marion has an enjoyable climate for those who enjoy all four seasons.
Marion, Illinois gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Marion averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 208 sunny days per year in Marion. The US average is 205 sunny days.
Marion gets some kind of precipitation, on average, 104 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 23
Rain: averages 47 inches of rain a year
Snow: averages 12 inches of snow a year