The climate in Rock Island Arsenal, IL is typically mild to warm. Summers are warm and humid with temperatures usually reaching the mid-80s. Winters are cold but usually short, with temperatures usually around freezing or slightly below. The area gets an average of 38 inches of precipitation annually, with both snow and rain occurring throughout the year. Spring and autumn tend to be pleasant, with clear skies and moderate temperatures.
Rock Island Arsenal, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Rock Island Arsenal averages 28 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 Rock Island Arsenal. The US average is 205 sunny days.
Rock Island Arsenal 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 28 inches of snow a year