June in Shibukawa averages a daily high of 27.1°C. Expect roughly 14.4 wet days totalling 166.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Shibukawa is September–November.
Based on MAEBASHI, JA (11km), 1995–2024. 22 years of June data.