May in Sfântu Gheorghe averages a daily high of 3.8°C with nights around -1°C. Expect roughly 17.4 wet days totalling 93.2mm. 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. 27 years of May data.