January in Yiyang is the coldest month of the year. In January, the weather in Yiyang is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Yiyang has 12 sunny, 10 partly cloudy, 7 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February, March, April, and June is considered the most uncomfortable time to visit Yiyang.