December in Cluj-Napoca averages a daily high of 2.3°C with nights around -3.2°C. Expect roughly 10.3 wet days totalling 35.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Cluj-Napoca is May–September.
Based on CLUJ NAPOCA, RO (3.1km), 1995–2024. 30 years of December data.