January in Gyeongsan is the snowiest, the sunniest, and the coldest month of the year. In January, the weather in Gyeongsan is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Gyeongsan has 22 sunny, 6 partly cloudy, 2 cloudy, and 1 snowy day in January. The snowfalls are usually light.