September in Alba Iulia averages a daily high of 21.8°C with nights around 9.4°C. Expect roughly 9.2 wet days totalling 58.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Alba Iulia is June–October.
Based on SIBIU, RO (52.9km), 1995–2024. 30 years of September data.