Trader consensus on a 21°C high for Busan on October 14 rests on consistent forecasts from the Korea Meteorological Administration and global models showing clear skies, light northwest winds, and peak afternoon temperatures reaching that level under typical mid-October radiative heating. Observed readings through the day aligned closely with these projections, with no significant model spread or unexpected atmospheric shifts such as enhanced onshore flow or cloud cover. This outcome falls within the historical range for the date, where daily maxima often cluster near 20–22°C. A realistic challenge would require either a localized station anomaly, revised post-event quality control, or an unforecasted surge in boundary-layer mixing that pushes the verified peak to 22°C or holds it at 20°C.