Trader sentiment for Seoul's August 2026 total precipitation reflects high uncertainty around the East Asian monsoon's withdrawal and late-season typhoon influences, with <150 mm and 500 mm+ bins nearly tied. The rainy season typically ends by late July in central Korea, shifting August toward shorter convective showers and reduced baseline rainfall near the long-term average of roughly 100–150 mm. However, steering patterns from the subtropical high and any lingering moisture can draw tropical cyclones, producing localized extremes that push totals well above 300 mm. Current model spreads and historical analogs highlight how subtle shifts in sea surface temperatures or jet stream position could favor either drier conditions or clustered heavy events, keeping mid-range outcomes competitive.