This image from the Illinois State Water Survey shows the climatological normal chances of a White Christmas, defined as 1" of snow on the ground Christmas morning. Most of central and southeast Illinois has between a 25% and 35% chance. (click image to enlarge)
Record cold was found across central Illinois. Peoria's low temperature of 24 degrees below zero established a December record, while daily record lows were established at Champaign, at 20 below zero, and Springfield, at 14 below zero.
Spring-like weather spread across Illinois just a week after astronomical winter began. Springfield recorded a high temperature of 74 degrees, which tied the city's December record high. A high of 70 in Peoria stands as the second warmest December temperature on record, while Champaign recorded a daily record high of 68 degrees.