December in Đồng Hới averages a daily high of 22.6°C. Expect roughly 13.1 wet days totalling 132mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Đồng Hới is January–April.
Based on DONG HOI, VM (2.8km), 1995–2024. 18 years of December data.