December in Davis averages a daily high of 13.8°C with nights around 3.6°C. Expect roughly 11.9 wet days totalling 105mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Davis is April–May.
Based on DAVIS 2 WSW EXPERIMENTAL FARM, CA US (3.3km), 1995–2024. 30 years of December data.