December in Choshi averages a daily high of 12.5°C with nights around 5.4°C. Expect roughly 8.1 wet days totalling 90.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Choshi is May–October.
Based on CHOSHI, JA (1.5km), 1995–2024. 19 years of December data.