June in Cotonou is the rainiest month of the year. In June, the weather in Cotonou is typically hot. Average daily high temperature in June is about 28 degrees above zero. On average, Cotonou has 27 rainy, 1 sunny, 1 cloudy, and 1 partly cloudy day in June. The rains are usually heavy. June as well as March, April, May, and July is considered the most uncomfortable time to visit Cotonou.