December in Sfântu Gheorghe averages a daily high of -4.5°C with nights around -10.3°C. Expect roughly 11.7 wet days totalling 57.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sfântu Gheorghe is July–August.
Based on VARFU OMUL, RO (53.1km), 1995–2024. 16 years of December data.