January in Chinchon is the coldest month of the year. In January, the weather in Chinchon is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Chinchon has 13 sunny, 13 partly cloudy, 3 cloudy, and 2 rainy days in January. The rains are usually light. January as well as February, March, and December is considered the most uncomfortable time to visit Chinchon.