The climate in Rock Falls, IL is generally temperate throughout the year. In summer months, temperatures typically range from the mid-70s to the low-90s during the day, with cooler evenings. During winter months, temperatures are usually between 30 and 40 degrees Fahrenheit during the day, with nighttime temperatures reaching down into the teens. Precipitation is fairly moderate throughout the year and snowfall is minimal compared to other parts of Illinois. The area also experiences occasional strong winds throughout much of winter and spring, making it an ideal place for outdoor activities all year round.
Rock Falls, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Rock Falls averages 29 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 198 sunny days per year in Rock Falls. The US average is 205 sunny days.
Rock Falls gets some kind of precipitation, on average, 100 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 12
Rain: averages 38 inches of rain a year
Snow: averages 29 inches of snow a year