January in Hengyang is the coldest month of the year. In January, the weather in Hengyang is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Hengyang has 10 partly cloudy, 9 rainy, 9 sunny, and 3 cloudy days in January. The rains are usually moderate. January as well as March, April, May, and June is considered the most uncomfortable time to visit Hengyang.