There is an increased chance of above-average precipitation for the northern half of Illinois in October and an increased chance of above-average temperatures in October-November-December for all of Illinois, according to the latest outlooks from the NOAA Climate Prediction Center.
The first map shows the precipitation outlook for October. Wetter-than-average conditions are expected in much of the northern Corn Belt as well. The rest of Illinois is in equal chances (EC) of above, below, and near-average precipitation. All of Illinois has equal chances of above, below, and near-average temperatures. Another way to think of “EC” is that the odds are evenly divided among the three categories.
In the last 30 days, much above-average precipitation has spread across Iowa, Illinois, and Indiana. In the map below, areas in green are up to 4 inches above average and areas in blue are up to 8 inches above average. This could be a concern as we start the fall harvest season.
Below are the outlooks for October and October-November-December. The most interesting feature is the increased chance of above-average temperatures for October-November-December. The pattern of above-average temperatures stretches from coast to coast and includes most of the Midwest.
Illinois has equal chances for above, below, and near-average precipitation for October-November-December.