May in Osijek averages a daily high of 23.1°C with nights around 11.1°C. Expect roughly 11.7 wet days totalling 77.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Osijek is April–October.
Based on OSIJEK, HR (5.1km), 1995–2024. 29 years of May data.