December in Berkeley averages a daily high of 14.5°C with nights around 6.6°C. Expect roughly 10.3 wet days totalling 134.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Berkeley is May–October.
Based on BERKELEY, CA US (1.1km), 1995–2024. 27 years of December data.