December in Pattaya is the coldest month of the year. In December, the weather in Pattaya is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Pattaya has 16 partly cloudy, 7 sunny, 7 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 Pattaya.