March in Port Harcourt is the rainiest, the windiest, and the cloudiest month of the year. In March, the weather in Port Harcourt is typically hot. Average daily high temperature in March is about 29 degrees above zero. On average, Port Harcourt has 31 rainy days in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Port Harcourt.