The statewide average precipitation for August in Illinois
was 2.95 inches, 0.64 inches below average. However, this was
followed by a very wet June with 9.44 inches, and a wet July
with 4.84 inches.
As a result, the summer precipitation total was 17.23 inches, or
5.36 inches above average and the 6th wettest summer on record.
The wettest summer on record was in 1993 with 18.51 inches of
rain.
The precipitation for August was unevenly distributed, which is
typical in the summer months. Amounts of 3 to 5 inches were
common in northern Illinois and points east of St. Louis.
The statewide average temperature for Illinois in August was
72.0 degrees, 1.6 degrees below average and the 32nd coolest
August on record. The statewide average temperature for the
summer (June, July, and August) was 72.6 degrees, 1.3 degrees
below average and the 36th coolest on record.
[Lisa A. Sheppard, Illinois Water
Survey]
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