September in Split averages a daily high of 25.5°C with nights around 18.5°C. Expect roughly 7.1 wet days totalling 81.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Split is May–June.
Based on SPLIT MARJAN, HR (1km), 1995–2024. 29 years of September data.