September in Sfântu Gheorghe averages a daily high of 6.5°C with nights around 0.9°C. Expect roughly 10.8 wet days totalling 76.2mm. 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. 25 years of September data.