Trader consensus clusters around 14–18°C for Busan’s October 13 minimum, reflecting model spread on overnight cooling. Clear skies after earlier showers promote radiational cooling, while northwest winds advect cooler, drier air from the continent; however, lingering cloud cover or higher dew points could limit the drop. Official forecasts range from roughly 13°C under optimal clear, breezy conditions to 18–19°C if clouds persist or marine influence strengthens. This uncertainty aligns with typical mid-October variability, where Busan’s daily lows average near 15–16°C but shift several degrees with synoptic patterns. Updated model runs and Korea Meteorological Administration observations tonight will likely narrow the range before resolution.