Strong El Niño conditions, with Niño 3.4 anomalies exceeding +2 °C and forecasts for further intensification, introduce notable uncertainty into East Asian monsoon dynamics and typhoon tracks affecting Seoul. Historical August totals average near 350 mm, yet 2026 outlooks from the Korea Meteorological Administration point to near- or below-average rainfall overall, tempered by heightened atmospheric instability that favors localized convective downpours. Traders weigh the potential for monsoon retreat timing and 2–3 typhoon influences against climatological baselines, producing closely matched market-implied odds across low and extreme bins; model consensus on steering patterns and precipitation variability will likely shift as August forecast updates emerge.