August in Ōtsu averages a daily high of 33.9°C. Expect roughly 10.5 wet days totalling 175.6mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Ōtsu is April–May.
Based on KYOTO, JA (12.3km), 1995–2024. 24 years of August data.