Sterling, IL boasts a moderate climate with warm summers and cold winters. The average summer temperature is around 80°F (27°C) and the average winter temperature is around 20°F (-7°C). During the warmer months, there can be quite a bit of humidity but this usually dissipates during the cooler months. Rainfall varies throughout the year but tends to remain relatively consistent, with an average of about 37 inches each year. Snowfall averages approximately 19 inches per winter season, making it possible for residents to enjoy outdoor activities such as skiing and snowboarding.
Sterling, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sterling averages 29 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Sterling. The US average is 205 sunny days.
Sterling gets some kind of precipitation, on average, 103 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