December in Takamatsu averages a daily high of 12.2°C. Expect roughly 7.1 wet days totalling 46.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Takamatsu is April–June.
Based on TAKAMATSU, JA (1.8km), 1995–2024. 21 years of December data.