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2021 was Warmer and Wetter than Normal

Illinois was both warmer and wetter than the 1991–2020 normal in 2021. The statewide average annual temperature was 53.7 degrees, 1.1 degrees above normal and tied for the 10th warmest ...
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Exceptionally Warm December Wraps up 2021

The preliminary statewide average December temperature was 39.4 degrees, 9.6 degrees above the 1991–2020 average and the second warmest on record going back to 1895. The preliminary statewide average total ...
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The December 2021 Tornado Outbreak in Illinois

Severe thunderstorms developed in the late afternoon, evening, and night of Friday December 10, 2021. Among strong winds and hail, several tornadoes occurred in Arkansas, Missouri, Tennessee, Kentucky, and Illinois, ...
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A Mild November Wraps Up Climatological Fall

The preliminary statewide average November temperature was 40.7 degrees, 1.0 degrees below the 1991–2020 average and 53rd coldest on record going back to 1895. The preliminary statewide average total November ...
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Warm and Wet October

The preliminary statewide average October temperature was 59.7 degrees, 5.1 degrees above the 1991–2020 average and eighth warmest on record going back to 1895. The preliminary statewide average total October ...
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