September in Pondicherry is the rainiest month of the year. In September, the weather in Pondicherry is typically hot. Average daily high temperature in September is about 32 degrees above zero. On average, Pondicherry has 26 rainy, 3 cloudy, and 1 sunny day in September. The rains are usually heavy. September as well as August, October, and November is considered the most uncomfortable time to visit Pondicherry.