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The Illinois State Climatologist Office has a new website and blog starting in 2019! Please bookmark and visit the new site here: go.illinois.edu/climatologist Thanks! Advertisements
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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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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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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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Illinois and the Midwest have been running hot so far in September.  The statewide average temperature for September 1-19, 2018, in Illinois was 73.5 degrees and 4.7 degrees above normal. Days at or above 90 degrees have been quite common this September, especially in central and southern Illinois where we saw 8 to 12 days …
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August: the statewide average temperature for Illinois in August was 74.9 degrees, 1.3 degrees above normal.  The statewide average rainfall was 5.25  inches, 1.66 inches above normal and the 12th wettest August on record. The warmest daily high temperature was 97 degrees reported at Chicago Botanical Gardens (8/5), Chicago O’Hare (8/4), Jerseyville (8/7), and Pittsfield …
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Illinois experienced a wet start to September, thanks in part to Tropical Storm Gordon.  The statewide average rainfall through yesterday morning was 3.55 inches.  That is above the 3.24 normal rainfall for the entire month of September.  The highest month-to-date rainfall total was 10.15 inches and came from Clay City (east of St. Louis). Here …
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Introduction The Great Flood of 1993 resulted in $36.3 billion dollars in losses and 48 deaths.  It was considered the 8th worst natural disaster in US history in terms of dollars.  The top six were hurricanes, followed by the 1988 drought/heat wave.  Large regions of the Missouri and Upper Mississippi River basins were impacted by …
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What the Almanacs Say Recently, both the Farmer’s and Old Farmer’s Almanacs released their winter forecasts (below) and what they say for Illinois is quite different.  The Farmer’s Almanac predicts a “Biting Cold, Snowy” winter while the Old Farmer’s Almanac predicts a “Warm, wet” winter for Illinois. The Farmer’s Almanac states that it “bases its …
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First of all, is it really July 19th already?  As a kid I remember summers lasting almost forever, now it seems to last about two weeks.  I feel cheated. July: So far, the statewide average temperature for July is 77.4 degrees, 1.5 degrees above normal.  The statewide average precipitation is 1.94 inches, 93 percent of …

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