August in Cao Bằng averages a daily high of 32.5°C. Expect roughly 16.7 wet days totalling 253.9mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Cao Bằng is February–March.
Based on CAO BANG, VM (0.8km), 1995–2024. 19 years of August data.