April in Yotsukaidō averages a daily high of 18.9°C. Expect roughly 11.6 wet days totalling 129.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Yotsukaidō is April–June.
Based on CHIBA, JA (8.2km), 1995–2024. 27 years of April data.