January in Khao Lak is the sunniest month of the year. In January, the weather in Khao Lak is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Khao Lak has 20 rainy, 5 sunny, 3 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as March, April, May, and June is considered the most uncomfortable time to visit Khao Lak.