August in Asan is the cloudiest and the hottest month of the year. In August, the weather in Asan is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Asan has 16 rainy, 7 partly cloudy, 5 sunny, and 3 cloudy days in August. The rains are usually heavy. August as well as January, February, July, and December is considered the most uncomfortable time to visit Asan.