January in Shirakawa averages a daily high of 5.1°C. Expect roughly 6.6 wet days totalling 34.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Shirakawa is May–June.
Based on SHIRAKAWA, JA (4.3km), 1995–2024. 29 years of January data.