December in Collado-Villalba averages a daily high of 4.1°C with nights around -1.5°C. Expect roughly 14.1 wet days totalling 156.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Collado-Villalba is July–August.
Based on NAVACERRADA, SP (16.2km), 1995–2024. 30 years of December data.