Trader sentiment for Seoul's highest temperature on March 27 remains tightly contested around 14-16°C, with 15°C edging ahead at 22% implied probability, driven by Korea Meteorological Administration (KMA) ensemble forecasts converging on mid-teens Celsius peaks amid a transitional spring pattern. Recent model runs from ECMWF and GFS highlight differentiating factors like variable cloud cover—potentially capping highs at 14°C if low-level stratus lingers—or clearer skies and southerly winds boosting to 16°C via enhanced insolation and warm air advection from the Pacific. Historical March 27 averages sit at 13.5°C, but above-normal sea surface temperatures and a retreating Siberian high pressure system underpin the upside skew, with KMA's next hourly update poised to refine odds further.