In September, the weather in Campos dos Goytacazes is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, Campos dos Goytacazes has 15 sunny, 9 partly cloudy, 4 rainy, and 2 cloudy days in September. The rains are usually light. September as well as May, June, July, and August is considered the most comfortable time to visit Campos dos Goytacazes.