June in Mostar averages a daily high of 30.6°C with nights around 18.1°C. Expect roughly 8.4 wet days totalling 75.3mm. 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. 17 years of June data.