Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Split emerges as the optimal September destination with an overall TripTiming Index of 74/100 vs 73/100 for Dubrovnik (+1 point advantage). Split captures optimal environmental comfort with 26°C daytime feels-like temperatures and 16% rain probability, compared to 23°C in Dubrovnik. This is reinforced by lower lodging rates (~$229/night vs ~$322/night, saving ~$651 over 7 nights). While Dubrovnik retains an edge in Space & Crowds (70/100 vs 63/100), Split's commanding performance in Weather Comfort secures the overall September recommendation.