December in Muan is the windiest month of the year. In December, the weather in Muan is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Muan has 11 partly cloudy, 10 sunny, 6 rainy, and 4 cloudy days in December. The rains are usually light. December as well as January, February, July, and August is considered the most uncomfortable time to visit Muan.