McHenry, IL has a humid continental climate with cold, snowy winters and warm, humid summers. During the winter months temperatures typically range from 20 to 40 degrees Fahrenheit, with occasional days dropping below 0 degrees. Snowfall averages around 40 inches throughout the season. In summer months temperatures can reach up to 90 degrees Fahrenheit with high humidity levels making it feel even hotter outside. Precipitation is plentiful in McHenry, averaging over 30 inches per year. The area experiences four distinct seasons with spring and fall being particularly pleasant times to visit the city.
McHenry, Illinois gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
McHenry averages 37 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 189 sunny days per year in McHenry. The US average is 205 sunny days.
McHenry gets some kind of precipitation, on average, 113 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 82 degrees
Winter Low: the January low is 13
Rain: averages 36 inches of rain a year
Snow: averages 37 inches of snow a year