December in Oviedo averages a daily high of 12.6°C with nights around 5.4°C. Expect roughly 14.8 wet days totalling 108.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Oviedo is June–October.
Based on OVIEDO, SP (2.4km), 1995–2024. 28 years of December data.