January in Petrozavodsk averages a daily high of -6.1°C with nights around -11.9°C. Expect roughly 18.9 wet days totalling 37.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Petrozavodsk is June–August.
Based on PETROZAWODSK, RS (5.5km), 1995–2024. 23 years of January data.