September in Nouadhibou is the rainiest and the warmest month of the year. In September, the weather in Nouadhibou is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Nouadhibou has 25 sunny, 4 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as July, August, October, and November is considered the most comfortable time to visit Nouadhibou.