Should you consider a Napa Valley winter trip in December or January? Napa Valley during these two months is undoubtedly the quietest time in this spectacular wine country. As one long-time Napa Valley resident once mentioned to me, “Winter is how the Valley used to be during the entire year long ago.” If you really want to get away, this is the time to be in the Napa Valley. It’s beautiful, serene, and most of all relaxing. Here are a few things to do in December and January in the Napa Valley.