“Virtually all of the Chicagoland area is running a precipitation deficit for the calendar year, and most of that deficit has come in the past 90 days. The deficits are much worse in the northern half of the area. For example, stations in Elgin, Mundelein and Barrington are running 8- to 9-inch deficits since Jan. 1, but around 90% of that deficit (7 to 8 inches) is only in the last 90 days.”
Trent Ford, Illinois state climatologist