August weather forecast in Addison

August in Addison is the sunniest and the hottest month of the year. In August, the weather in Addison is typically hot. Average daily high temperature in August is about 35 degrees above zero. On average, Addison has 19 sunny, 5 rainy, 5 partly cloudy, and 2 cloudy days in August. The rains are usually moderate. August as well as January, February, May, and June is considered the most uncomfortable time to visit Addison.