January in Ross-on-Wye is the coldest month of the year. In January, the weather in Ross-on-Wye is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Ross-on-Wye has 12 rainy, 11 partly cloudy, 5 cloudy, and 3 sunny days in January. The rains are usually moderate. January as well as February, March, April, and May is considered the most uncomfortable time to visit Ross-on-Wye.