Maryville, IL has a humid continental climate with warm and humid summers and cold, snowy winters. Average temperatures range from highs in the summer of around 85 degrees Fahrenheit to lows in the winter of around 18 degrees Fahrenheit. Precipitation is relatively high all year round, averaging around 39 inches annually. Snowfall ranges from an average of 20 inches in the south up to an average of around 40 inches in the north. Despite the sometimes unpredictable weather, Maryville remains a vibrant community with plenty of things to do for its residents and visitors alike.
Maryville, Illinois gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Maryville averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 205 sunny days per year in Maryville. The US average is 205 sunny days.
Maryville 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 89 degrees
Winter Low: the January low is 22
Rain: averages 43 inches of rain a year
Snow: averages 12 inches of snow a year