January in Mariinsk is the most freezing month of the year. In January, the weather in Mariinsk is typically freezing. Average daily high temperature in January is about 16 degrees below zero. On average, Mariinsk has 23 cloudy, 6 snowy, and 2 sunny 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 Mariinsk.