December in Hitachi-Naka averages a daily high of 11.5°C. Expect roughly 6.1 wet days totalling 52.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hitachi-Naka is April–June.
Based on MITO, JA (6.3km), 1995–2024. 20 years of December data.