January in Nichinan averages a daily high of 13.5°C. Expect roughly 6.4 wet days totalling 68.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nichinan is October–December.
Based on ABURATSU, JA (3.7km), 1995–2024. 28 years of January data.