National Weather Service United States Department of Commerce

Clouds are expected to stick around through at least early on Sunday. There will be at least two rounds of rain, one tonight into Friday and another over southeast Missouri and southwest Illinois late on Saturday. Temperatures will remain relatively mild for late December.
While Christmas week is expected to be mild, a pattern change is likely around the New Year. Below normal temperatures are favored for the first half of January in what is already the climatologically coldest time of year.