2019-20 winter (DJF) at DCA had 26 days with a negative daily temperature departure, two of those -10.
But there were 65 above normal days including 26 with at least a +10.
It isn't even done at that point. 24+ hours of freezing rain with temps in the mid- to upper 20's and more than 1" QPF would definitely leave a mark. Glad it will change in the coming week.