December in Cartagena averages a daily high of 17.4°C with nights around 5.4°C. Expect roughly 4.5 wet days totalling 31mm. 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 December data.