The preliminary statewide average March temperature was 47.3 degrees, 5.9 degrees above the 1991–2020 normal, 7.5 degrees above the 20th Century average, 5.3 degrees above the most recent 30-year average, and it tied for 9th warmest March on record going back to 1895. The preliminary statewide average total March precipitation was 4.85 inches, 1.91 inches […]
Category: Heat
July Was H-O-T T-O G-O
The preliminary statewide average July temperature was 78.3 degrees, 2.9 degrees above the 1991–2020 average and tied for 16th warmest on record going back to 1895. The preliminary statewide total July precipitation was 5.95 inches, 1.89 inches above the 1991–2020 average and the 10th wettest on record. Data are provisional and may change slightly over […]
August Wraps up a Mild and Drier Summer
The preliminary statewide average August temperature was 73.5 degrees, 0.1 degree above the 1991–2020 average and tied for the 63rd coolest on record going back to 1895. The preliminary statewide average total August precipitation was 4.43 inches, 0.87 inches above the 1991–2020 average and the 29th wettest on record statewide. Data are provisional and may […]
25th Anniversary of the 1995 Chicago Heat Wave
This week marks the 25th anniversary of the July 1995 heat wave in Chicago, one of the worst weather-related disasters in Illinois history. The excessive heat and humidity, compounded by social and economic vulnerability, resulted in more than 700 deaths over a five day period. The chart below shows the daily progression of maximum and […]
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