Illinois State Water Survey Illinois State Climatologist

Second Coldest April on Record in Illinois

Temperature Based on the official data, the statewide average temperature was  44.5 degrees,  8.1 degrees below normal. It was the second coldest April on record, only beaten by 43.1 degrees set in April 1907. Our statewide records go back to 1895. Normal refers to a specific benchmark, the 1981-2010 average. See the longer explanation here. Here are […]

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Second Driest October on Record for Illinois, But Not for Long

As of this morning, the statewide average precipitation in Illinois was 0.34 inches. That makes it the second driest October on record. However, the forecast for Tuesday will move us down in the rankings. In the meantime, here is where we stand for dry Octobers: Rank Year Amount Departure Percent of Average 1 1964 0.18 […]

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January 2015 in Illinois – Cool and Dry

January 2015 in Illinois was cooler and drier than average. The statewide temperature was 25.4 degrees, 1 degree below average and the 53rd coldest on record. However, it was not nearly as cold as last January when the average temperature was 19.3 degrees and ranked as the 16th coldest on record. The statewide average precipitation […]

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