March in Cotonou is the windiest month of the year. In March, the weather in Cotonou is typically hot. Average daily high temperature in March is about 31 degrees above zero. On average, Cotonou has 21 rainy, 6 sunny, 2 cloudy, and 2 partly cloudy days in March. The rains are usually moderate. March as well as May, June, July, and August is considered the most uncomfortable time to visit Cotonou.