April in Katori-shi averages a daily high of 16.8°C with nights around 10.9°C. Expect roughly 12.1 wet days totalling 131.6mm. 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 April data.