October in Nagaoka averages a daily high of 20.7°C. Expect roughly 14.9 wet days totalling 163.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nagaoka is May–June.
Based on NIIGATA, JA (54.8km), 1995–2024. 21 years of October data.