I recall the famous December 4 th or 5 th snowstorm from 2002 I believe. The lead into that great winter, and a great tip off to the potential as well for the months ahead.
We had 6 to 8 inches of snow here. The following day my daughter had piano lessons, I recall taking her out that morning and with the incoming cold air combined with deep snow cover we achieved a low of 6 or 7 degrees F. I believe.
Snow cover, if deep enough, as you know is a real boost to lower temps at night and the day as well.