Recent forecasts from the Korea Meteorological Administration and other models indicate minimum temperatures in the Seoul-Incheon area on August 18 will likely fall between 24–25°C, driving the near-even market split. A shift toward clearer skies and reduced precipitation after widespread showers on August 14–17 should allow modest overnight radiative cooling under a humid subtropical air mass, though high dew points and light winds limit further drops. Ensemble guidance shows tight clustering around these values, with small differences in predicted cloud cover, boundary-layer mixing, or timing of any residual moisture determining whether the low registers closer to 24°C or 25°C. Updated model runs and official briefings in the next 24–48 hours will provide the key data for refining this narrow range.