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Cool, Warm, Wet, Dry, and a Derecho: A Wild August Ends Climatological Summer

August was slightly cooler and much drier than average across Illinois. The preliminary statewide average August temperature was 72.7 degrees, 0.9 degrees below the 30-year normal and the 45th coolest ...
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Looking Ahead to Fall – Recent Temperature Changes and First Freeze Dates

As we approach the end of climatological summer, I have received several questions regarding the fall, harvest, and potential of an early freeze. In this post I try to address ...
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Active July Continues a Warm Summer

July was warmer and wetter than average across Illinois, continuing a warmer than average summer season. The preliminary statewide average July temperature was 77.2 degrees, 1.8 degrees above the 30-year ...
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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 ...
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A Mostly Warm, Dry Start to Summer

June was warmer and drier than average across the state. The preliminary statewide average June temperature was 73.7 degrees, 1.8 degrees above the 30-year normal and tied for the 26th ...
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