January in Bath is the windiest and the coldest month of the year. In January, the weather in Bath is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Bath has 18 rainy, 6 sunny, 4 cloudy, and 3 partly cloudy days in January. The rains are usually moderate. January as well as February, August, November, and December is considered the most uncomfortable time to visit Bath.