January in Sri Jayawardenapura Kotte is the windiest and the sunniest month of the year. In January, the weather in Sri Jayawardenapura Kotte is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Sri Jayawardenapura Kotte has 10 rainy, 9 partly cloudy, 8 sunny, and 4 cloudy days in January. The rains are usually heavy.