Persistent northeasterly flow and widespread cloud cover with ongoing light to moderate rain are keeping overnight temperatures in Busan stable near 19°C on September 26. Official forecasts from the Korea Meteorological Administration and multiple models project a daily minimum between 16–20°C, consistent with historical September averages around 18.5°C and current surface observations showing dew points near 18°C under overcast skies. The lack of clear-sky radiational cooling or stronger cold advection supports trader consensus around 18–20°C as the most probable outcomes, with resolution hinging on the precise hourly minimum reported by local stations. Updated model runs through the evening of September 25 show minimal shifts in this range.