January in Lyon is the coldest month of the year. In January, the weather in Lyon is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Lyon has 11 rainy, 8 cloudy, 6 sunny, and 6 partly cloudy days in January. The rains are usually moderate. January as well as February, April, May, and November is considered the most uncomfortable time to visit Lyon.