August in Zemun averages a daily high of 29.8°C with nights around 18.7°C. Expect roughly 7.8 wet days totalling 58.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Zemun is May–June.
Based on BELGRADE OBSERVATORY, RI (7.3km), 1995–2024. 30 years of August data.