National Weather Service United States Department of Commerce

Skies are expected to clear out through the day which will allow temperatures to warm into the upper 80s to low 90s across northern Illinois and northwest Indiana – well above the normal high temperatures of 73F. The record high today in Chicago is 92F and in Rockford it is 94F. Near record warmth will continue Friday and Saturday.
After a wet June and July for most of the area, a dry pattern developed in August and has continued through September. While year to date precipitation amounts are near to above normal, the recent dryness has been indicated on the U.S. Drought Monitor, with areas of D0-D1 from southern Wisconsin to central Illinois and Indiana. Finally, the Climate Prediction Center monthly precipitation outlook for October favors below normal precipitation.