September in Constanţa averages a daily high of 23.4°C with nights around 15.8°C. Expect roughly 5.5 wet days totalling 48.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Constanţa is May–October.
Based on CONSTANTA, RO (4.4km), 1995–2024. 30 years of September data.