Mill Creek, IL has a humid continental climate, characterized by warm to hot summers and cold winter months. Average high temperatures in the summer months range from the upper 70s to the mid-80s Fahrenheit, while average low temperatures in the winter months range from the upper teens to the lower 20s Fahrenheit. Precipitation is fairly evenly spread throughout the year, with light snowfall during the winter months. The climate can be quite extreme at times, with scorching heat waves in summer and bitterly cold temperatures in winter.
Mill Creek, Illinois gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Mill Creek averages 10 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 219 sunny days per year in Mill Creek. The US average is 205 sunny days.
Mill Creek gets some kind of precipitation, on average, 105 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 25
Rain: averages 49 inches of rain a year
Snow: averages 10 inches of snow a year