June in Rijeka averages a daily high of 27.3°C with nights around 17.7°C. Expect roughly 8.6 wet days totalling 78.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Rijeka is May–June.
Based on RIJEKA, HR (0.9km), 1995–2024. 29 years of June data.