December in Iizuka averages a daily high of 11.6°C. Expect roughly 12.6 wet days totalling 75.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Iizuka is April–May.
Based on IIZUKA, JA (1.9km), 1995–2024. 28 years of December data.