May weather forecast in Ko Chang

May in Ko Chang is the hottest month of the year. In May, the weather in Ko Chang is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Ko Chang has 25 rainy, 3 sunny, and 3 cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Ko Chang.