October in Port-au-Prince is the rainiest month of the year. In October, the weather in Port-au-Prince is typically warm. Average daily high temperature in October is about 27 degrees above zero. On average, Port-au-Prince has 27 rainy and 4 sunny days in October. The rains are usually heavy. October as well as March, April, May, and June is considered the most uncomfortable time to visit Port-au-Prince.