Rainfall
On average, May is the wettest month of the year in Illinois with a statewide normal of 4.62 inches. And so far, this May is living up to that reputation. The two maps below show the rainfall totals through this morning (May 11) for northern and southern Illinois. Rainfall totals were heaviest in the northeast quarter of the state with many areas receiving between 2 and 3 inches or more (shades of yellow and beige). Areas in green are a little lower and range from 0.5 to 2 inches (depending on the shade of green).