August in Rosso is the rainiest and the cloudiest month of the year. In August, the weather in Rosso is typically hot. Average daily high temperature in August is about 34 degrees above zero. On average, Rosso has 18 partly cloudy, 9 sunny, 3 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as March, April, May, and June is considered the most uncomfortable time to visit Rosso.