December in Minamiarupusu averages a daily high of 11.6°C. Expect roughly 4.9 wet days totalling 42.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Minamiarupusu is April–May.
Based on KOFU, JA (10.1km), 1995–2024. 25 years of December data.