Forecast models from the Korea Meteorological Administration and international agencies indicate a minimum temperature near 25–26°C for Seoul/Incheon on August 15, with some runs projecting 24°C under increased overnight cloud cover and light winds that limit radiational cooling. High humidity near 70–80% and possible scattered showers further moderate nighttime temperature drops by trapping heat in the boundary layer. Recent short-range guidance shows consistency in daytime maxima around 32–33°C but greater spread in lows, reflecting typical late-summer variability when the monsoon influence weakens. Traders appear to weigh these subtle differences in model consensus against historical August baselines of 23–25°C, with the tight 24°C versus 25°C split reflecting uncertainty in exact cloud timing and urban heat retention ahead of final observations.