December in Ilza is the windiest month of the year. In December, the weather in Ilza is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Ilza has 13 cloudy, 8 rainy, 7 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 Ilza.