April in Porto-Novo is the hottest month of the year. In April, the weather in Porto-Novo is typically hot. Average daily high temperature in April is about 31 degrees above zero. On average, Porto-Novo has 15 rainy, 6 partly cloudy, 5 sunny, and 4 cloudy days in April. The rains are usually moderate. April as well as March, May, June, and July is considered the most uncomfortable time to visit Porto-Novo.