It's in the long range, but most of the data points towards a surge of arctic air by the middle of the first week of January. It's still tough to know how strong and long this will stick around. Also, we'll need to watch for any moisture getting involved. With arctic air in place, anything can happen.
Until then, it will cool to mild. This video goes over everything from A to Z with maps from weatherbell.com and eurowx.com