January in Petrozavodsk is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Petrozavodsk is typically freezing. Average daily high temperature in January is about 7 degrees below zero. On average, Petrozavodsk has 19 cloudy, 8 snowy, 2 partly cloudy, 1 rainy, and 1 sunny day in January. The snowfalls are usually light.