January in Vostok is the cloudiest and the most freezing month of the year. In January, the weather in Vostok is typically freezing. Average daily high temperature in January is about 10 degrees below zero. On average, Vostok has 18 cloudy, 6 snowy, 4 sunny, and 3 partly cloudy days in January. The snowfalls are usually light. January as well as February, April, May, and June is considered the most uncomfortable time to visit Vostok.