March in Kalutara is the hottest month of the year. In March, the weather in Kalutara is typically hot. Average daily high temperature in March is about 30 degrees above zero. On average, Kalutara has 21 rainy, 5 sunny, 4 partly cloudy, and 1 cloudy day in March. The rains are usually heavy. March as well as April, May, June, and July is considered the most uncomfortable time to visit Kalutara.