Posen, IL has a humid continental climate, with cold winters and warm summers. Winters are usually cold with temperatures typically ranging from 20-30 degrees Fahrenheit, while summers are hot and humid with temperatures in the 80s to low 90s. Precipitation is plentiful throughout the year, with an average of 42 inches of rain per year. Snowfall averages around 25 inches per year, but can range much higher or lower depending on the winter season. Winters tend to be windy as well, as lake effect snow occurs regularly due to Posen's close proximity to Lake Michigan.
Posen, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Posen averages 32 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 Posen. The US average is 205 sunny days.
Posen gets some kind of precipitation, on average, 124 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 18
Rain: averages 38 inches of rain a year
Snow: averages 32 inches of snow a year