December in Vostok is the windiest month of the year. In December, the weather in Vostok is typically freezing. Average daily high temperature in December is about 7 degrees below zero. On average, Vostok has 11 partly cloudy, 8 snowy, 7 sunny, and 5 cloudy days in December. The snowfalls are usually moderate. December as well as January, February, April, and May is considered the most uncomfortable time to visit Vostok.