Recent Korea Meteorological Administration guidance indicates a 25°C overnight low for Seoul and Incheon on August 23, driven by expected clearing after widespread rain through the morning of the 22nd and moderate south-easterly flow under the western edge of the North Pacific high. High humidity and residual cloud cover limit nocturnal radiative cooling, supporting a tropical-night pattern where minima remain near or above 24–25°C; stronger clearing or lighter winds could allow a dip to 23–24°C, while persistent moisture or delayed clearing would favor 26°C or higher. International models show modest spread in the timing of any showers and boundary-layer mixing, contributing to the dispersed market distribution around the 25°C outcome. Updated KMA short-range guidance and ensemble runs over the next 48 hours will likely tighten trader consensus.