August in Bath is the rainiest month of the year. In August, the weather in Bath is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Bath has 19 rainy, 5 sunny, 5 cloudy, and 2 partly cloudy days in August. The rains are usually moderate. August as well as January, February, November, and December is considered the most uncomfortable time to visit Bath.