Recent forecast models from the Korea Meteorological Administration indicate Seoul will experience typical late-spring conditions on May 17, with a high-pressure system promoting clear skies and moderate warming that supports maximum temperatures near 24–25°C. Ensemble guidance shows limited variability from daytime solar heating and light southerly flow, keeping probabilities closely split between these two outcomes while reducing chances for 26°C or above. Historical May climatology for Seoul places average highs at 22–23°C, providing context for why traders assign modest weight to cooler readings below 23°C. Updated model runs this evening will refine boundary-layer mixing and any residual cloud cover, directly informing final market resolution by official observations.