September in Paris is the sunniest month of the year. In September, the weather in Paris is typically warm. Average daily high temperature in September is about 19 degrees above zero. On average, Paris has 10 sunny, 10 partly cloudy, 7 rainy, and 3 cloudy days in September. The rains are usually moderate. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Paris.