Home

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 ...
Read More

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 ...
Read More

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 ...
Read More

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 ...
Read More

Dry and Mild Start to Fall

The preliminary statewide average September temperature was 66.8 degrees, 0.6 degrees above the 1991–2020 average and the 57th warmest on record going back to 1895. The preliminary statewide average total ...
Read More