Traders have converged on a 25°C low for Seoul and Incheon on August 15 due to the Korea Meteorological Administration’s official forecast, which sets the daily minimum at exactly that level amid persistent summer conditions. Current observations show overnight readings near 24–25°C under cloudy skies with scattered showers, aligning with regional climatology where mid-August lows typically range 23–26°C. Ensemble model consensus supports limited overnight cooling given high humidity and weak winds. A realistic challenge would require stronger-than-expected convective activity or a sharper post-frontal push to drop readings below the threshold before midnight, though no such signal appears in the latest guidance.