December in Ventura averages a daily high of 18.2°C with nights around 7.9°C. Expect roughly 5.9 wet days totalling 56.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ventura is May–November.
Based on OXNARD VENTURA CO AIRPORT, CA US (11.9km), 1995–2024. 26 years of December data.