The earliest month for snow can vary greatly depending on your location. In many parts of the northern United States, Canada, and certain mountainous regions, snow can start as early as October.
Since you mentioned getting snow on November 1st last year, it suggests you live in a region where early snowfall is possible. Generally, areas with colder climates may experience snowfall in late October or early November.
If you share your general location or region, I could provide a more specific answer!