January in Port-au-Prince is the sunniest and the coldest month of the year. In January, the weather in Port-au-Prince is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Port-au-Prince has 25 sunny, 4 partly cloudy, and 2 rainy days in January. The rains are usually light. January as well as February and December is considered the most comfortable time to visit Port-au-Prince.