Oak Grove, IL has a humid continental climate with hot summers and cold winters. The average high temperatures in July reach into the mid-80s while the lows during winter months dip into the teens. On average, Oak Grove gets around 45 inches of rain and 18 inches of snow annually. The area is known for its humid summers, often causing thunderstorms to move through the area in late afternoons. However, this can also lead to mild and pleasant days throughout spring and fall seasons.
Oak Grove, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Oak Grove averages 29 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 Oak Grove. The US average is 205 sunny days.
Oak Grove gets some kind of precipitation, on average, 115 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 85 degrees
Winter Low: the January low is 15
Rain: averages 37 inches of rain a year
Snow: averages 29 inches of snow a year