January in Kostin Log is the most freezing month of the year. In January, the weather in Kostin Log is typically freezing. Average daily high temperature in January is about 13 degrees below zero. On average, Kostin Log has 11 cloudy, 8 snowy, 6 sunny, and 6 partly cloudy days in January. The snowfalls are usually light. January as well as February and December is considered the most uncomfortable time to visit Kostin Log.