January in Ozersk is the most freezing month of the year. In January, the weather in Ozersk is typically freezing. Average daily high temperature in January is about 12 degrees below zero. On average, Ozersk has 21 cloudy, 4 snowy, 4 sunny, and 2 partly cloudy days in January. The snowfalls are usually light. January as well as February, October, and December is considered the most uncomfortable time to visit Ozersk.