Hanover, IL has a humid continental climate typical of the Midwest. Summers are hot and humid with frequent thunderstorms, while winters are cold and snowy with temperatures below freezing. Spring and autumn are mild, although the weather can be unpredictable at times. Precipitation is abundant throughout the year, with over 40 inches of rain per year on average. Hanover is also known for its occasional tornadoes, although these rarely cause serious damage to property or lives.
Hanover, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Hanover averages 33 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 194 sunny days per year in Hanover. The US average is 205 sunny days.
Hanover gets some kind of precipitation, on average, 111 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 84 degrees
Winter Low: the January low is 11
Rain: averages 37 inches of rain a year
Snow: averages 33 inches of snow a year