Not much time below freezing this winter

This winter has been pretty warm. Except for one morning when the temperature plunged to 15F, Annapolis has spent most of the winter above freezing. Using the NOAA tidal gauge station 8575512 data from 01 Dec-12 Jan, Annapolis has been below freezing 50.7 hours (out of a possible 1008 hours), less than 5% of the time. Measuring days when the temperature went below 30F gives far fewer hours: only 27.8 hours below 30F in the past 41 days (an avg of 30 mins/day below 30F). We'll see how the next few days go (the prediction is for some colder air for the next week), but needless to say, the first 1/2 of "meteorological winter" (Dec, Jan, and Feb) has been noticeably warm.