Illinois State Water Survey Illinois State Climatologist

June Brought Summer Heat & Storms

The preliminary statewide average June temperature was 74.4 degrees, 2.2 degrees above the 1991–2020 average and the 18th warmest June on record going back to 1895. The preliminary statewide total June precipitation was 4.15 inches, 0.50 inches below normal and the 52nd wettest June on record statewide. Data are provisional and may change slightly over […]

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Mild May Wraps Up an Otherwise Warm Spring in Illinois

The preliminary statewide average May temperature was 63.0 degrees, 0.2 degrees below the 1991–2020 average and the 58th warmest on record going back to 1895. The preliminary statewide average total May precipitation was 3.75 inches, 1.02 inches below the 1991–2020 average and the 55th driest on record statewide.     Data are provisional and may change […]

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Warmer April in Illinois

The preliminary statewide average April temperature was 53.1 degrees, 0.5 degrees above the 1991-2020 average and tied for 42nd warmest on record going back to 1895. The preliminary statewide average total April precipitation was 5.46 inches, 1.22 inches above the 1991-2020 average and 18th wettest on record statewide. Data are provisional and may change slightly […]

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February’s Roller Coaster Weather Wraps up Winter

The preliminary statewide average February temperature was 28.4 degrees, 2.7 degrees below the 1991–2020 average and the 52nd coldest on record going back to 1895. The preliminary statewide average total February precipitation was 1.25 inches, 0.85 inches below the 1991–2020 average and the 29th driest on record statewide.     Data are provisional and may change […]

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