In September, the weather in Sri Jayawardenapura Kotte is typically warm. Average daily high temperature in September is about 27 degrees above zero. On average, Sri Jayawardenapura Kotte has 28 rainy and 2 sunny days in September. The rains are usually heavy. September as well as March, April, May, and June is considered the most uncomfortable time to visit Sri Jayawardenapura Kotte.