A wet month of May across the state...
The statewide average rainfall for Illinois in May was 5.6inches, 1.3 inches above average. Combined with the 2.8 inches in March and 7.3 inches in April, the total rainfall for this spring was 15.7 inches. This is the seventh wettest spring on record since 1895 and 4.3 inches above average, according to the Illinois State Water Survey.
May rainfall totals were highest for Anna in southern Illinois with 10.04 inches, followed closely by Woodhull in western Illinois with 9.92 inches.
Spring rainfall totals were highest in southern Illinois. Cairo reported the highest total rainfall with 30.90 inches, followed by Brookport Dam with 29.19 inches, Du Quoin with 28.95 inches, and Carbondale with 27.59 inches. These numbers are slightly more than double the average spring rainfall.