Recent forecasts from multiple models indicate a high of 26–28°C in Busan on September 24, driven by stable high pressure, light variable winds, and partly to mostly cloudy skies that limit strong daytime heating. Historical September averages near 26°C provide context, with current conditions showing slightly above-normal warmth from a persistent ridge but no strong warm advection. Key variables differentiating the tightly clustered market outcomes include afternoon cloud cover thickness, the strength of any southeast sea breeze moderating coastal readings, and minor model spreads in maximum temperature timing. Updated runs from agencies like the Korea Meteorological Administration and global ensembles will likely narrow the range before resolution, as traders weigh these subtle atmospheric factors against the low probability assigned to extremes.