December in Ko Chang is the windiest month of the year. In December, the weather in Ko Chang is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Ko Chang has 18 partly cloudy, 7 sunny, 5 cloudy, and 1 rainy day in December. The rains are usually light. December as well as January and February is considered the most comfortable time to visit Ko Chang.