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A Very Mild Start to 2023

The preliminary statewide average January temperature was 33.8 degrees, 7.1 degrees above the 1991–2020 average and the 6th warmest on record going back to 1895. The preliminary statewide average total ...

2022 was Cooler and Drier than Normal

Illinois was both cooler and drier than the 1991–2020 normal in 2022. The statewide average annual temperature was 52.0 degrees, 0.6 degrees below normal and tied for the 51st warmest ...

December Brought a Mix of Everything to Kick Off Winter

The preliminary statewide average December temperature was 29.4 degrees, 0.6 degrees below the 1991–2020 average and the 61st coldest on record going back to 1895. The preliminary statewide average total ...

Big Temperature Swings in November, which Wraps Up an Otherwise Mild Fall

The preliminary statewide average November temperature was 42.3 degrees, 0.6 degrees above the 1991–2020 average and tied for 45th warmest on record going back to 1895. The preliminary statewide average ...

October Brought Real Fall to Illinois

The preliminary statewide average October temperature was 53.1 degrees, 1.6 degrees below the 1991–2020 average and tied for the 40th coolest on record going back to 1895. The preliminary statewide ...