January in Sangju is the snowiest and the coldest month of the year. In January, the weather in Sangju is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Sangju has 15 sunny, 9 partly cloudy, 4 cloudy, 2 rainy, and 1 snowy day in January. The rains are usually light. January as well as February, March, July, and August is considered the most uncomfortable time to visit Sangju.