**Trader consensus at 11°C reflects current observational data and forecast models indicating a minimum air temperature of 11°C at official Busan stations under clear skies and light winds favoring radiative cooling overnight.** Autumn conditions with dew points near 10–12°C and minimal cloud cover have allowed efficient heat loss from the surface, aligning with National Meteorological Agency guidance and recent hourly trends showing evening temperatures dropping steadily toward this threshold. Historical October lows in the region average near 15°C, but the present stable high-pressure pattern has produced cooler nocturnal minima consistent with model consensus. The 100% market-implied probability leaves little room for deviation unless an unexpected warm advection or station-specific microclimate effect alters the final recorded value before resolution.