December in Oakland averages a daily high of 15.4°C with nights around 7.6°C. Expect roughly 10.7 wet days totalling 129.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Oakland is May–October.
Based on OAKLAND MUSEUM, CA US (0.9km), 1995–2024. 27 years of December data.