Recent forecasts from regional meteorological models indicate a maximum temperature of 28°C in Busan on September 23 under partly cloudy skies, light northeasterly winds, and moderate humidity levels around 60-70%, aligning with the market's near-certain 28°C outcome. This reflects observed trends of seasonal cooling from late-summer highs, consistent with historical September averages near 25-26°C and current atmospheric stability without significant warm advection. Trader consensus treats official station readings, likely from the Korea Meteorological Administration, as definitive for resolution. Unlikely shifts could arise from localized urban heat effects, revised observational data, or rapid cloud cover changes altering insolation, though model agreement and the day's advanced timing limit such variance.