September weather forecast in Kerrville

September in Kerrville is the rainiest month of the year. In September, the weather in Kerrville is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Kerrville has 15 sunny, 10 rainy, and 5 partly cloudy days in September. The rains are usually moderate. September as well as January, May, August, and December is considered the most uncomfortable time to visit Kerrville.