January in Belostok is the most freezing month of the year. In January, the weather in Belostok is typically freezing. Average daily high temperature in January is about 15 degrees below zero. On average, Belostok has 13 cloudy, 8 snowy, 6 partly cloudy, and 4 sunny days in January. The snowfalls are usually light. January as well as February, October, and December is considered the most uncomfortable time to visit Belostok.