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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Latest News – 6th Coldest Year on Record for Illlinois

The National Climatic Data Center (NCDC) released their numbers for 2014 and Illinois ended up at 49.5 degrees and the 6th coldest year on record for Illinois. Other Midwestern and southern states experienced one of the 10 coldest years for their particular state. Meanwhile,  many of the western states experienced one of their warmest years […]

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Cold Start to November in the Midwest

So far, November has been cooler than average across Illinois and the eastern two-thirds of the Midwest (below). The statewide average temperature is about 5 degrees below average. The NWS forecasts indicate that temperatures are likely to stay below-average for the next two weeks across Illinois and the Midwest. The second and third maps are the […]

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