December in Kanchanaburi is the coldest month of the year. In December, the weather in Kanchanaburi is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Kanchanaburi has 19 partly cloudy, 10 sunny, and 2 cloudy days in December. December as well as January is considered the most comfortable time to visit Kanchanaburi.