July in Cotonou is the cloudiest month of the year. In July, the weather in Cotonou is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Cotonou has 27 rainy and 4 cloudy days in July. The rains are usually heavy. July as well as March, May, June, and August is considered the most uncomfortable time to visit Cotonou.