Current short-range forecasts from the Korea Meteorological Administration indicate Seoul’s overnight minimum on May 19 will likely settle in the mid-teens Celsius, shaped by mild southerly flow, moderate humidity, and variable cloud cover that limits radiative cooling. The near-even pricing across 15–18 °C outcomes captures genuine model uncertainty: clearer skies or lighter winds could allow an extra degree of overnight drop, while any increase in low-level moisture or wind would hold temperatures closer to 17–18 °C. This range sits slightly above the long-term May climatology of 12–14 °C, reflecting a warmer-than-average spring pattern now in place. The next KMA model runs and evening updates will refine the exact threshold before resolution.