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In terms of precipitation, rainfall in Petrozavodsk ranges from 0.8 - 3.1 inches per month. July is typically the wettest month, when rainfall can reach 3.1 in. January is typically the driest time to visit Petrozavodsk when rainfall is around 0.8 in.
If weather is an important factor for your trip to Petrozavodsk, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 59.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 10.4 F).