Recent forecast models from Korean meteorological agencies and global ensembles point to a minimum temperature of 19°C in Incheon on September 27, driven by stable high-pressure conditions, light variable winds, and partly cloudy skies that limit overnight radiative cooling. Official observations and guidance show overnight lows holding near 19–20°C, consistent with late-September climatology but slightly above historical averages for the period. Market-implied odds exceeding 94% on 19°C reflect trader consensus on these verified model outputs and current surface conditions. A shift to clearer skies or stronger northerly flow could allow the temperature to dip to 18°C or lower before dawn, though such deviations appear unlikely based on the latest runs.