January in Belley is the coldest month of the year. In January, the weather in Belley is typically cold. Average daily high temperature in January is about 4 degrees above zero. On average, Belley has 14 rainy, 8 sunny, 8 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as February, May, November, and December is considered the most uncomfortable time to visit Belley.