Recent forecasts from the Korea Meteorological Administration and international models converge on overnight lows of 24–25°C for Incheon on August 21 amid persistent cloud cover, light rain, and thunderstorms driven by a moist southerly flow. High humidity (near 90%) and elevated dew points limit nocturnal radiative cooling, keeping minimum temperatures from falling below the seasonal norm of roughly 23–24°C. Trader consensus, with 24°C at 46% and 25°C at 35.5% implied probability, aligns with this model agreement and the low likelihood of clearer skies or stronger northerly advection that could produce cooler readings. Updated model runs and official briefings in the next 24 hours remain the key near-term catalysts.