December in Mana is the windiest month of the year. In December, the weather in Mana is typically freezing. Average daily high temperature in December is about 12 degrees below zero. On average, Mana has 16 snowy, 11 cloudy, 3 sunny, and 1 partly cloudy day in December. The snowfalls are usually moderate. December as well as January, February, April, and May is considered the most uncomfortable time to visit Mana.