September in Cartagena averages a daily high of 30.6°C with nights around 18.1°C. Expect roughly 4 wet days totalling 42.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Cartagena is February–May.
Based on MURCIA ALCANTARILLA, SP (45.1km), 1995–2024. 30 years of September data.