In December, the weather in Achayvayam is typically freezing. Average daily high temperature in December is about 12 degrees below zero. On average, Achayvayam has 9 snowy, 8 sunny, 8 partly cloudy, and 6 cloudy days in December. The snowfalls are usually light. December as well as January, February, March, and May is considered the most uncomfortable time to visit Achayvayam.