December in Zelenogorsk is the snowiest month of the year. In December, the weather in Zelenogorsk is typically freezing. Average daily high temperature in December is about 12 degrees below zero. On average, Zelenogorsk has 12 snowy, 10 cloudy, 5 partly cloudy, and 4 sunny days in December. The snowfalls are usually light. December as well as January, February, September, and October is considered the most uncomfortable time to visit Zelenogorsk.