August in Lyon is the sunniest month of the year. In August, the weather in Lyon is typically warm. Average daily high temperature in August is about 24 degrees above zero. On average, Lyon has 20 sunny, 6 partly cloudy, and 5 rainy days in August. The rains are usually moderate. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Lyon.