Marengo, IL has a humid continental climate, with hot summers and cold winters. During the summer months, temperatures can reach into the mid to upper 80s and in the winter months, temperatures can drop well below freezing. Snowfall is common during the winter months, with an average of 28 inches of snow annually. Precipitation levels are also high throughout the year, with an average of 40 inches per year. In general, Marengo experiences all four seasons quite distinctly.
Marengo, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Marengo averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 191 sunny days per year in Marengo. The US average is 205 sunny days.
Marengo gets some kind of precipitation, on average, 112 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 83 degrees
Winter Low: the January low is 12
Rain: averages 37 inches of rain a year
Snow: averages 34 inches of snow a year