Recent Korea Meteorological Administration (KMA) short-range forecasts and ensemble model guidance for August 20 point to a daytime maximum near 32–33°C in the Seoul-Incheon area under mostly cloudy skies with a 20–30% chance of showers, driving trader consensus toward the closely matched 29°C and 30°C outcomes. Subtle differences in these leading probabilities reflect uncertainty in afternoon cloud cover, boundary-layer mixing, and weak steering flow that could limit peak insolation by 1–2°C or allow brief clearing. Earlier August heatwave conditions tied to easterly downslope warming have eased, while historical late-summer climatology shows typical maxima of 29–31°C. Updated model runs and KMA briefings expected within 48 hours remain the key variables that could shift implied probabilities before resolution.