Recent short-range model consensus from sources like the Korea Meteorological Administration and global ensembles points to a mostly cloudy, humid late-summer pattern over the Seoul-Incheon region on August 28, with daytime highs likely peaking near 29–30 °C. Persistent cloud cover, elevated dew points near 23–25 °C, and a 40–60 % chance of scattered showers or thunderstorms—driven by lingering moisture from a weakening monsoon boundary and weak easterly flow—should limit surface heating and suppress the daily maximum relative to clearer conditions earlier in the week. Official Incheon International Airport observations will resolve the market; any earlier or heavier rainfall could cap the high at 29 °C or below, while delayed or lighter precipitation might allow brief clearing and a push toward 31 °C. Trader sentiment clusters around these outcomes because ensemble spread remains modest only 48 hours out, yet small timing differences in convection introduce meaningful uncertainty at the 1 °C threshold level.