August in Banja Luka averages a daily high of 30.3°C with nights around 16.4°C. Expect roughly 7 wet days totalling 65.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Banja Luka is April–June.
Based on BANJA LUKA, BK (1km), 1995–2024. 14 years of August data.