Illinois State Water Survey Illinois State Climatologist

Cold, Snowy November in Illinois

It was a cold and snowy November in Illinois. The statewide average temperature for November was  35.2°F, which is an impressive 7.3°F below normal, ranking November 2018 as the 8th coldest on record. The statewide average rainfall for November was 3.11 inches, which is 0.36 inches below normal. The highest temperature recorded for the month […]

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Heat, Frost, Snow, and Rain – Just a Typical October in Illinois

I love the weather in Illinois – hardly ever a dull moment.  This October we experienced days in the 90s, the first fall frost, the first snow of the season, and widespread heavy rains. The statewide average temperature departure for the first 9 days of October was 11.5 degrees above normal.  There were many reports […]

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NOAA Outlook for Winter in Illinois

Today, NOAA released the official outlook for winter (December-February).  Not much to report for Illinois.  The northern third of the state has a slightly increased chance of a warmer than normal winter.  And northeastern Illinois has a slightly increased chance of a drier than normal winter. However, the increased odds are very weak and we […]

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Above-Normal Temperatures and Rainfall for September in Illinois

Based on preliminary data, Illinois experienced above-normal temperatures and rainfall for September in Illinois.  Here are the statistics for the state: The statewide average temperatures for September was 70.0 degrees, 3.8 degrees above normal and the 12th warmest September on record.  We were on track to one of the warmest Septembers on record until the […]

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