Latest short-range forecasts from the Korea Meteorological Administration and international models point to a June 24 high in Seoul most likely in the 27–29°C range, consistent with market-implied odds clustered around those outcomes. Primary drivers include the early influence of the East Asian summer monsoon, which is increasing humidity and introducing variable cloud cover or isolated showers that can suppress peak afternoon temperatures. Ensemble guidance shows modest day-to-day adjustments in timing of any frontal passage or diurnal heating, creating the tight spread between 27°C and 29°C. Historical June baselines for Seoul average near 27°C, with urban heat-island effects and model uncertainty in boundary-layer moisture providing the key variables traders are weighing ahead of final observational data on June 24.