Recent meteorological forecasts indicate a strong likelihood of peak temperatures reaching or exceeding 25°C in Seoul on May 18, driven by a warm air mass advected from the south under high-pressure dominance and clear skies that enhance daytime solar heating. Official guidance from the Korea Meteorological Administration highlights daytime highs potentially climbing into the upper 20s Celsius, consistent with late-spring climatological trends where average May maxima hover near 23°C but can spike several degrees higher amid favorable synoptic patterns. Model consensus shows limited variability in this outlook, with minimal precipitation expected to moderate conditions, supporting the market's heavy weighting toward warmer outcomes while underscoring the narrow window for any last-minute shifts from evolving upper-level dynamics.