September in Port-de-Paix is the rainiest and the hottest month of the year. In September, the weather in Port-de-Paix is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Port-de-Paix has 15 rainy, 10 sunny, 4 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as October and November is considered the most uncomfortable time to visit Port-de-Paix.