January in Zemun averages a daily high of 5.5°C with nights around -0.7°C. Expect roughly 11.9 wet days totalling 55.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Zemun is May–June.
Based on BELGRADE OBSERVATORY, RI (7.3km), 1995–2024. 29 years of January data.