September in Ba Đồn averages a daily high of 30.8°C with nights around 24.2°C. Expect roughly 14.8 wet days totalling 490.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ba Đồn is January–April.
Based on DONG HOI, VM (35.4km), 1995–2024. 19 years of September data.