If you're looking for summer vibes, the best time to travel to Petrozavodsk is in June, July and August, when the average temperature reaches 15.14 °C, while May, June and July are the 3 sunniest months of the year, with an average of 105.03 hours.
However, if you prefer colder temperatures, make sure you visit Petrozavodsk during January, February or March to experience an average of -8.18 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and April, when the average precipitation in Petrozavodsk is 2.6 mm, while the months of January, February and March are drier, with an average of 0 mm.