March in Khao Lak is the hottest month of the year. In March, the weather in Khao Lak is typically hot. Average daily high temperature in March is about 30 degrees above zero. On average, Khao Lak has 25 rainy, 4 sunny, and 2 partly cloudy days in March. The rains are usually heavy. March as well as January, April, May, and June is considered the most uncomfortable time to visit Khao Lak.