If you live in the North a week of cold and snow is pretty much guaranteed, with -4 uppers at worst. For the south it's more uncertain in terms of snow, but I would bet a lot of money that you will get snow at some point in the next 7 days. On boxing day here we only had -4/5 uppers in a NW flow, and it rained for hours before that but we still got a good 5cm of snow with Sheffield getting 15cms. No reason to be negative even if you live in the south, unless your looking for severe cold with massive blizzards.