December in Jaén averages a daily high of 13.3°C with nights around 6.4°C. Expect roughly 8.7 wet days totalling 68.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Jaén is April–June.
Based on JAEN, SP (1.8km), 1995–2024. 30 years of December data.