August in Honjō averages a daily high of 32.8°C. Expect roughly 11.3 wet days totalling 145.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Honjō is April–May.
Based on KUMAGAYA, JA (19.9km), 1995–2024. 24 years of August data.