October in Katori-shi averages a daily high of 21.6°C with nights around 16.9°C. Expect roughly 13.3 wet days totalling 260.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Katori-shi is May–October.
Based on CHOSHI, JA (36.5km), 1995–2024. 16 years of October data.