 The wettest June on record was in 1902 with 8.4 inches of rainfall.
Statewide records extend back to 1895.The largest rainfall totals
occurred in the northern two-thirds of the state, where amounts of 7
to 13 inches were common. Meanwhile, far southern Illinois remained
closer to normal, with amounts ranging from 3 to 6 inches.
Some long-term precipitation gauge sites set records for their
wettest June -- Galesburg with 13.24 inches, Havana with 10.58
inches and Lincoln with 10.79 inches.
The statewide average temperature for June was 74.9 degrees, 3
degrees above normal. Based on preliminary data, this is the
10th-warmest June. The warmest June on record was in 1934 with 78.5
degrees.
Of the 10 wettest Junes in Illinois history, in seven out of 10
cases, rainfall returned to within an inch of normal in July and
August. Only in 1993 did the wet conditions persist during the next
two months. Drier conditions occurred in July and August only in
1945 and 1947.
"This June had both near-record rainfall and much warmer than
normal temperatures. That’s very unusual, considering that in most
cases, a wet June tends to run on the cool side," Angel said.
The Illinois State Water Survey, at the University of Illinois at
Urbana-Champaign, is a division of the Institute of Natural Resource
Sustainability and is the primary Illinois agency concerned with
water and atmospheric resources.
[Text from file received from
the Illinois
State Water Survey]
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