August in Mostar averages a daily high of 33.9°C with nights around 20.9°C. Expect roughly 5.6 wet days totalling 55.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mostar is April–May.
Based on MOSTAR, BK (1km), 1995–2024. 18 years of August data.