December in Matsumoto averages a daily high of 8.2°C. Expect roughly 6.1 wet days totalling 38.7mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Matsumoto is April–June.
Based on MATSUMOTO, JA (1.9km), 1995–2024. 27 years of December data.