December in Chula Vista averages a daily high of 19.5°C with nights around 8.2°C. Expect roughly 5 wet days totalling 37.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Chula Vista is April–November.
Based on CHULA VISTA, CA US (0.1km), 1995–2024. 23 years of December data.