Westchester, IL has a humid continental climate with hot summers and cold winters. The average temperature in the summer months is around 75°F while the average winter temperature is around 24°F. During the summer, Westchester typically experiences high levels of humidity due to its close proximity to Lake Michigan. Precipitation is fairly evenly distributed throughout the year but tends to come mostly during the spring months as thunderstorms are common in this region. Winters tend to be cold and snowy with an average snowfall of 32 inches.
Westchester, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Westchester averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 187 sunny days per year in Westchester. The US average is 205 sunny days.
Westchester gets some kind of precipitation, on average, 120 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 17
Rain: averages 39 inches of rain a year
Snow: averages 34 inches of snow a year