December in Kuopio averages a daily high of -2°C with nights around -6.4°C. Expect roughly 17.5 wet days totalling 54.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kuopio is June–August.
Based on KUOPIO SAVILAHTI, FI (2km), 1995–2024. 20 years of December data.