December weather forecast in Siem Reap

December in Siem Reap is the coldest month of the year. In December, the weather in Siem Reap is typically hot. Average daily high temperature in December is about 30 degrees above zero. On average, Siem Reap has 13 sunny, 13 partly cloudy, 3 rainy, and 2 cloudy days in December. The rains are usually light. December as well as January is considered the most comfortable time to visit Siem Reap.