July in Roma is the windiest and the sunniest month of the year. In July, the weather in Roma is typically hot. Average daily high temperature in July is about 38 degrees above zero. On average, Roma has 20 sunny, 6 rainy, 4 partly cloudy, and 1 cloudy day in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Roma.