Official forecasts from the Korea Meteorological Administration and global models indicate minimum temperatures in Busan on September 2 will likely fall in the 23–26°C range, aligning with early-September climatology where overnight lows average near 21–23°C. Key drivers include persistent southerly flow, elevated sea-surface temperatures in the Korea Strait moderating radiative cooling, and partial cloud cover from scattered showers limiting nocturnal temperature drops. Ensemble spread in numerical weather prediction outputs creates the observed market equilibrium near 50% across several thresholds, as small shifts in timing of any onshore breeze or precipitation could push the daily minimum by 1–2°C. Updated KMA guidance and next model runs will provide the clearest near-term resolution signals.