Snowfall during December was a small fraction of what normally is observed. The map above shows the percent of normal accumulated snowfall. Snowfall was less than 25% of normal across the area, and some locations only saw flurries occur. (click image to enlarge)
Winter storm #16 of the 1977-78 winter season produced heavy snow across the central third of Illinois. Totals of 7-8 inches were reported near Quincy, from Springfield southwest into Greene County, and also from Mattoon eastward to the Indiana border near Terre Haute.