May in Afton is the rainiest month of the year. In May, the weather in Afton is typically cold. Average daily high temperature in May is about 9 degrees above zero. On average, Afton has 22 rainy, 5 sunny, 2 cloudy, and 2 partly cloudy days in May. The rains are usually heavy. May as well as April is considered the most uncomfortable time to visit Afton.