August in Gyeryong is the hottest month of the year. In August, the weather in Gyeryong is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Gyeryong has 17 rainy, 7 partly cloudy, 6 sunny, and 1 cloudy day in August. The rains are usually heavy. August as well as January, February, July, and December is considered the most uncomfortable time to visit Gyeryong.