August weather forecast in Washington

August in Washington is the cloudiest month of the year. In August, the weather in Washington is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Washington has 12 rainy, 9 partly cloudy, 8 sunny, and 2 cloudy days in August. The rains are usually heavy. August as well as January, February, March, and June is considered the most uncomfortable time to visit Washington.