Up in Michigan, where I was born, thinking about snow in November is a regular occurrence. Here in the Southeast, snow does not usually hit until much later, if ever. The Daily Mail just published a NOAA map of the median date of first measurable snowfall with a link to an interactive version that you might find useful.
Median means that half of the first snows occur before this date and half after this date. Measurable snowfall is snow that measures at least 0.1 inches, so a few snow flurries don’t count. You can read the article and see the maps at http://www.dailymail.co.uk/sciencetech/article-3302512/Winter-coming-Maps-reveal-days-snow-areas-likely-hit-worst.html.