December in Vyborg averages a daily high of -1.4°C with nights around -5.8°C. Expect roughly 18.9 wet days totalling 68.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Vyborg is June–August.
Based on VYBORG, RS (2.9km), 1995–2024. 24 years of December data.