June in Porto-Novo is the rainiest and the cloudiest month of the year. In June, the weather in Porto-Novo is typically hot. Average daily high temperature in June is about 28 degrees above zero. On average, Porto-Novo has 28 rainy and 2 partly cloudy days in June. The rains are usually heavy. June as well as March, April, May, and July is considered the most uncomfortable time to visit Porto-Novo.