Lake Forest, IL is located in the Northern region of the United States, and as such it experiences all four distinct seasons. In the summer months, temperatures can reach up to the mid-80s Fahrenheit with high humidity. Winters are cold with temperatures dipping down to as low as 0°F. Spring and autumn bring moderate temperatures in the 40s and 50s respectively. Precipitation levels are usually moderate throughout the year, although snowfall is more common during the winter months.
Lake Forest, Illinois gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Lake Forest averages 38 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 190 sunny days per year in Lake Forest. The US average is 205 sunny days.
Lake Forest gets some kind of precipitation, on average, 121 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 16
Rain: averages 35 inches of rain a year
Snow: averages 38 inches of snow a year