The climate in Modesto, IL is largely temperate with hot and humid summers and cold, but mild winters. During the summer months, temperatures average in the mid-80s Fahrenheit (29-32°C) with high humidity. Winter temperatures are generally mild due to the moderating influence of Lake Michigan, ranging from around 30°F (-1°C) at night to the mid-40s (4-7°C) during the day. Rainfall amounts range from a low of around 30 inches (76 cm) in late spring to a peak of around 45 inches (114 cm) in late fall and early winter. Snowfall totals are generally light compared to other parts of the Midwest United States, typically ranging from 5-15 inches (13-38 cm).
Modesto, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Modesto averages 18 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 202 sunny days per year in Modesto. The US average is 205 sunny days.
Modesto gets some kind of precipitation, on average, 101 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 86 degrees
Winter Low: the January low is 19
Rain: averages 39 inches of rain a year
Snow: averages 18 inches of snow a year