January in Pattaya is the coldest month of the year. In January, the weather in Pattaya is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Pattaya has 16 sunny, 10 partly cloudy, 4 rainy, and 1 cloudy day in January. The rains are usually light. January as well as February and December is considered the most comfortable time to visit Pattaya.