January in Thiers is the cloudiest and the coldest month of the year. In January, the weather in Thiers is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Thiers has 11 rainy, 11 cloudy, 5 sunny, and 4 partly cloudy 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 Thiers.