Recent Korea Meteorological Administration short-range guidance highlights mostly cloudy skies and a chance of light rain or showers across the Seoul-Incheon region on August 16, which are limiting surface solar heating and favoring daytime maxima near 29–30°C. These conditions align with the late phase of the East Asian summer monsoon, when increased moisture and cloud cover typically suppress peaks below the early-August heatwave levels that exceeded 35°C. Incheon’s coastal location adds maritime moderation via sea breezes, while model consensus points to light winds that reduce mixing and keep temperatures from climbing higher. Traders’ emphasis on the 28–30°C outcomes reflects this updated forecast data and the narrow window before resolution, with any clearing trend or model shift potentially altering the distribution.