January in Santutxu averages a daily high of 13.6°C with nights around 5.5°C. Expect roughly 16 wet days totalling 144.9mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Santutxu is May–October.
Based on BILBAO AEROPUERTO, SP (5km), 1995–2024. 29 years of January data.