Troy, IL enjoys a humid continental climate with hot summers and cold winters. Average temperatures during the summer months range from the high 80’s to low 90’s while winter temperatures can dip down into the lower teens at night. Rainfall is distributed throughout the year and snowfall typically occurs between mid-November and early April. The area experiences all four seasons with cold winters from December through February, warm springs in March and April, hot summers from May until September, and cool autumn days in October and November.
Troy, Illinois gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Troy averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 204 sunny days per year in Troy. The US average is 205 sunny days.
Troy gets some kind of precipitation, on average, 97 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 22
Rain: averages 44 inches of rain a year
Snow: averages 12 inches of snow a year