Official forecasts from the Korea Meteorological Administration (KMA) and aligned model runs position the daily maximum at 21°C for Seoul and Incheon on October 13, following heavy rain and a sharp influx of colder northerly air that ended the prior day's record October warmth exceeding 30°C. Observed trends show morning lows near 13–17°C rising under clearing skies with moderate northwest winds, keeping afternoon peaks in the narrow 20–22°C band consistent with climatological expectations for mid-October after frontal passage. Market consensus at 100% on 21°C reflects this tight alignment between KMA station data, regional observations, and short-range guidance, with minimal model spread. A realistic shift would require sustained unexpected clearing or localized warming that pushes readings above 22°C at official sites, though incoming cold air and precipitation timing make that unlikely.