January in Bolshoy Istok is the most freezing month of the year. In January, the weather in Bolshoy Istok is typically freezing. Average daily high temperature in January is about 11 degrees below zero. On average, Bolshoy Istok has 14 cloudy, 6 snowy, 6 partly cloudy, 4 sunny, and 1 rainy day in January. The snowfalls are usually light. January as well as October and December is considered the most uncomfortable time to visit Bolshoy Istok.