In December, the weather in Kranj is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Kranj has 9 cloudy, 8 sunny, 8 partly cloudy, 5 rainy, and 1 snowy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Kranj.