October in Petrozavodsk is the windiest month of the year. In October, the weather in Petrozavodsk is typically cold. Average daily high temperature in October is about 6 degrees above zero. On average, Petrozavodsk has 13 cloudy, 11 rainy, 5 partly cloudy, and 2 sunny days in October. The rains are usually moderate. October as well as April, September, and November is considered the most uncomfortable time to visit Petrozavodsk.