December in Pamplona averages a daily high of 9.7°C with nights around 2.9°C. Expect roughly 12.8 wet days totalling 85.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Pamplona is May–October.
Based on PAMPLONA OBSERVATORIO, SP (0.6km), 1995–2024. 30 years of December data.