There is too small a sample for Nov, but I'm not so sure about December; while I am not a scientist, I will never make things up out of whole cloth ( former journalist, from an era when that meant you didn't present both sides of an issue if one of the sides was malarkey, think climate change "debate" ) I first learned of the association between low snow Decembers and low snow winters from a Rutgers meteorologist. Specifically, he cited New Brunswick patterns. He was quoted in the Star Ledger IIRC; this was a long time ago, but has generally been true as long as I've lived in the area, with a few exceptions, like 2015, and 2016 ( though we got most if not all of the seasonal average in one big storm ). But even then I wonder how robust that is; sounds more like a rule of thumb than a hard and fast rule. Most weather pros will tell you one can never rule out a big snow in any winter, even a mild one.