September in Roma is the rainiest and the cloudiest month of the year. In September, the weather in Roma is typically hot. Average daily high temperature in September is about 31 degrees above zero. On average, Roma has 15 rainy, 12 sunny, and 3 partly cloudy days in September. The rains are usually heavy. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most uncomfortable time to visit Roma.