In December, the weather in Spindleruv Mlyn is typically freezing. Average daily high temperature in December is about zero. On average, Spindleruv Mlyn has 15 cloudy, 6 snowy, 5 partly cloudy, 3 sunny, and 2 rainy days in December. The snowfalls are usually heavy. December as well as February, March, April, and May is considered the most uncomfortable time to visit Spindleruv Mlyn.