December in Ichinomiya averages a daily high of 11.7°C. Expect roughly 9.7 wet days totalling 81.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Ichinomiya is April–May.
Based on GIFU, JA (11.5km), 1995–2024. 25 years of December data.