National Weather Service United States Department of Commerce

Skies will become mostly sunny this morning. Otherwise, gradually warming temperatures through the weekend. Highs today will be in the 30s and then in the 40s on Sunday.
Did you say you're dreaming of a wet Christmas? No? Well, a wet and mild pattern could make that dream come through anyway. The highest chances of rain exist Monday evening through Christmas day morning along/south of I-44 in MO and I-70 in IL.
Here are the climate records for Christmas Day at St. Louis, Columbia, and Quincy.