December in Prosiana is the windiest month of the year. In December, the weather in Prosiana is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Prosiana has 20 cloudy, 4 rainy, 4 snowy, and 3 sunny days in December. The rains are usually moderate. December as well as February, March, and November is considered the most uncomfortable time to visit Prosiana.