August in Angleton is the hottest month of the year. In August, the weather in Angleton is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Angleton has 14 sunny, 12 rainy, and 5 partly cloudy days in August. The rains are usually heavy. August as well as January, June, July, and September is considered the most uncomfortable time to visit Angleton.