Freeport, IL has a humid continental climate, with warm summers and cold winters. The average temperature in summer is around 78°F (26°C), while the average winter temperature is around 23°F (-5°C). During the summer months, temperatures can often rise above 90°F (32°C), while nights are usually mild and comfortable. In winter, temperatures sometimes drop below zero degrees Fahrenheit. Rainfall is evenly distributed throughout the year, with an average of about 40 inches annually. Snowfall usually occurs from December through March, with an average of 20 inches of snow per season.
Freeport, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Freeport averages 33 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 193 sunny days per year in Freeport. The US average is 205 sunny days.
Freeport gets some kind of precipitation, on average, 114 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 37 inches of rain a year
Snow: averages 33 inches of snow a year