precipitation 2 | Illinois State Climatologist| Prairie Research Institute

Rain At Last in Illinois

Published October 28, 2015 by Jim Angel

Here is the rainfall map for the past 7 days. Most of the rain in Illinois has come in the last 2 days of that mapping period. In fact, almost all the rain in October for Illinois has fallen in the last 2 days. Most of Illinois was in the two lighter shades of green, […]

Cool, Dry August and Sixth Wettest Summer in Illinois

Published September 1, 2015 by Jim Angel

August was cool across the state and dry in most places in Illinois, capping off a summer that was cool and wet. Precipitation The statewide average precipitation for August in Illinois was 2.95 inches, 0.64 inches below average. However, this was followed by a very wet June with 9.44 inches, and a wet July with […]

Monthly Temperature and Precipitation for 2015 in Illinois

Published May 11, 2015 by Jim Angel

How things are shaping up in 2015? The outstanding features so far are the extremely cold February and the extremely wet conditions in southern Illinois while dry elsewhere. Monthly Temperature Departures from Average Blue means colder than average, red means warmer than average. Temperature departures from average tend to cover very large areas, making the […]

Above-Average Temperatures for April in Illinois

Published May 1, 2015 by Jim Angel

While there were a few cold stretches in April, the statewide average temperature for the month was 54.1 degrees, 1.7 degrees above average. Precipitation in Illinois for April was more complicated. April precipitation was in the range of two to four inches in northern and central Illinois, and 4 to 7 inches in southern Illinois. As […]