**Current KMA forecasts position a 24°C minimum as the baseline expectation for Seoul/Incheon on August 19, 2026, with trader-implied probabilities clustering around 24–25°C reflecting stable late-summer nocturnal conditions.** Official short-range guidance from the Korea Meteorological Administration shows a projected low of 24°C under mostly cloudy skies, consistent with observed minima of 23–25°C over the preceding days amid light winds and high humidity that limit radiative cooling. Climatologically, August lows in the region typically range 22–24°C as the seasonal decline begins, and the absence of strong cold-air advection or clearing skies supports this narrow band rather than sharper drops. Recent model consensus and surface observations reinforce moderate overnight temperatures without significant deviation expected before resolution, though updated KMA runs or shifts in cloud cover could adjust the exact minimum within the 23–26°C window favored by the market.