Bay Area residents will experience a drop in temperatures this weekend, as a flow of air from Canada moves south into Northern California. Temperatures are expected to dip into the 30s on New Years morning, but areas closer to the water—such as San Francisco—will stay slightly warmer. Meteorologists predict morning temperatures of 45 degrees on Jan. 1. Cold weather will continue into Monday and Tuesday in San Francisco, where daily highs may not reach 50 degrees.