December in Finlyandskiy averages a daily high of -0.8°C with nights around -4.9°C. Expect roughly 18.3 wet days totalling 53.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Finlyandskiy is May–August.
Based on ST. PETERSBURG, RS (3.6km), 1995–2024. 24 years of December data.