Trenton, IL has a humid continental climate. Summers are typically hot and humid, while the winters are cool to cold with occasional snowfall. In the summer months, temperatures average in the high 80s and lows in the mid-60s. The colder months tend to have highs in the low 40s and lows around 25 degrees Fahrenheit. Precipitation is distributed throughout the year, with an average of 38 inches annually.
Trenton, Illinois gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Trenton averages 11 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 198 sunny days per year in Trenton. The US average is 205 sunny days.
Trenton gets some kind of precipitation, on average, 91 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 89 degrees
Winter Low: the January low is 21
Rain: averages 42 inches of rain a year
Snow: averages 11 inches of snow a year