Recent forecasts from multiple models indicate a low temperature in Busan on September 28 near 20–21°C under mostly cloudy to overcast skies with light northwesterly winds. This consensus supports market-implied odds clustered around mid-20s Celsius outcomes while balancing probabilities for the 15°C-or-below and 25°C-or-higher brackets. Late-September radiative cooling is moderated by persistent cloud cover that reduces nighttime heat loss and by relatively warm surrounding sea-surface temperatures near 24–25°C. Typical climatological lows for the date hover around 21°C, with deviations driven by wind direction shifts or clearer skies that could enhance cooling. Official Korea Meteorological Administration observations will determine resolution, with final model runs and any overnight wind changes as the key near-term variables.