May in Augusta is the rainiest and the cloudiest month of the year. In May, the weather in Augusta is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Augusta has 16 rainy, 5 sunny, 5 cloudy, and 5 partly cloudy days in May. The rains are usually heavy. May as well as March, April, November, and December is considered the most uncomfortable time to visit Augusta.