April in Dambulla is the hottest month of the year. In April, the weather in Dambulla is typically hot. Average daily high temperature in April is about 31 degrees above zero. On average, Dambulla has 26 rainy, 3 sunny, and 1 partly cloudy day in April. The rains are usually heavy. April as well as May, October, November, and December is considered the most uncomfortable time to visit Dambulla.