Forecast models from the Korea Meteorological Administration and international sources project a daytime high near 29–31°C for Incheon on August 28, driven by southerly flow, partial cloud cover, and 30–60% rain chances that could limit peak heating. This range sits close to late-August climatology (average highs ~29–30°C), yet slight differences in timing of any showers or afternoon clearing create genuine uncertainty across bins. Ensemble guidance shows modest spread in maximum temperatures due to variable boundary-layer moisture and weak steering winds, keeping market-implied probabilities balanced near 50% for each threshold. Updated KMA runs and observational data over the next 48 hours will likely refine the diurnal peak before resolution.