August in Brownwood is the hottest month of the year. In August, the weather in Brownwood is typically hot. Average daily high temperature in August is about 33 degrees above zero. On average, Brownwood has 18 sunny, 10 partly cloudy, 2 rainy, and 1 cloudy day in August. The rains are usually light. August as well as January, June, July, and December is considered the most uncomfortable time to visit Brownwood.