Trader consensus clusters tightly around 25–26°C for Busan’s October 13 high, reflecting model agreement on a transitional frontal system. Southwesterly flow ahead of the boundary is advecting milder maritime air, yet widespread cloud cover and thunderstorm development—forecast with high probability—will reduce solar heating and cap afternoon maxima. This dynamic produces the narrow spread between leading outcomes, as modest shifts in timing or intensity of convection could swing the daily peak by 1–2°C. Historical mid-October averages near 22°C underscore the current warmth, while ongoing Korea Meteorological Administration updates and refined model runs will clarify resolution thresholds before the market settles.