On average, however, the statewide
precipitation was 4.81 inches, which is 0.73 inches above
In the northwestern part of the state, the average precipitation
for July was 7.83 inches, and the third wettest July on record.
The average wettest July on record was in 1902 with 9.21 inches.
The northeast experienced an average of 7.55 inches, and also
the third wettest July on record for that region. Again, the
number one year for the wettest July on record was in 1902.
Three of the highest monthly precipitation totals for July in
Illinois were Cary (McHenry County) with 13.34 inches, Gurnee
(Lake County) with 13.21 inches, and Chadwick (Carroll County)
with 13.15 inches.
On the other extreme, some areas in western and southwestern
Illinois were very dry with precipitation amounts of less than 2
inches. The lowest monthly total was at Quincy Dam with 0.68
The statewide average temperature for July was 76.1 degrees, 0.7
degrees above normal. Several stretches occurred with two to
five days of hot, humid weather. However, these conditions were
often interrupted by periods with slightly cooler, drier air as
cold fronts swept across the state.
As is often the case in Illinois in summer, the hottest readings
occurred in places that were dry. Locations that reported 100
degrees or higher included Jerseyville with 102 degrees, and
three locations, Pittsfield, Effingham, and Belleville, with 100