December in Arganda averages a daily high of 11.6°C with nights around 1.3°C. Expect roughly 7.7 wet days totalling 37.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Arganda is April–May.
Based on MADRID TORREJON, SP (20.3km), 1995–2024. 30 years of December data.