January in Bol'shiye Syry is the most freezing month of the year. In January, the weather in Bol'shiye Syry is typically freezing. Average daily high temperature in January is about 16 degrees below zero. On average, Bol'shiye Syry has 17 cloudy, 5 snowy, 5 sunny, and 4 partly cloudy days in January. The snowfalls are usually light. January as well as February, April, May, and September is considered the most uncomfortable time to visit Bol'shiye Syry.