Deep winner is 5 inches of snow on the ground and 15° below zero. The wind and cloud conditions for much of January didn’t allow the lows to go very low so our mean temperature for the month is artificially high. In my opinion. It hasn’t been a bitter month, but it’s been a solidly cold month up here
The gulf stream may be kissing and nuzzling the nape of Portsmouth, but it’s winter up here a few dozen miles to your west in the coastalplain.