Gillespie, IL is known for its hot, humid summers and cold winters. Temperatures in the summer months often reach into the 90s, and heat index values can make it feel even hotter. During winter, temperatures dip into the low 20s and can cause freezing conditions. The area receives an average of 40 inches of precipitation throughout the year. Snowfall is fairly common between October and April, although it varies from year to year.
Gillespie (zip 62033), Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Gillespie (zip 62033) averages 16 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Gillespie (zip 62033). The US average is 205 sunny days.
Gillespie (zip 62033) gets some kind of precipitation, on average, 102 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 88 degrees
Winter Low: the January low is 20
Rain: averages 40 inches of rain a year
Snow: averages 16 inches of snow a year