Current short-range forecasts from the Korea Meteorological Administration and global ensembles indicate Seoul's June 16 maximum will hinge on boundary-layer moisture and cloud cover over the next 48 hours, with model consensus centering near 28–29°C. Clear or partly cloudy conditions under a building subtropical high would favor peak radiative heating and push readings toward 30°C or higher, while increased humidity or scattered showers could suppress the daily high by 1–3°C through reduced insolation and evaporative cooling. Seoul's urban heat island typically adds 1–2°C relative to surrounding stations, though official resolution uses the central observatory site. Ensemble spread remains modest but widens with any shift in steering flow or frontal timing, keeping 27–29°C outcomes tightly bunched in trader pricing.