it depends though, if you look back at the 80s, January temps averaged in the 20s and there was a scarcity of snow. If you look at our snowiest winters, they actually weren't all that cold. Storm track is actually more important than Arctic air for snowfall at the coast. Arctic air is very fragile at our latitude and near the coast, you need a storm that takes the right track to keep it in place with the right wind direction.