August in Hermanus is the rainiest and the coldest month of the year. In August, the weather in Hermanus is typically warm. Average daily high temperature in August is about 15 degrees above zero. On average, Hermanus has 12 rainy, 12 sunny, and 7 partly cloudy days in August. The rains are usually heavy. August as well as June, July, and September is considered the most uncomfortable time to visit Hermanus.