Recent official forecasts from sources including the Korea Meteorological Administration and numerical models indicate a highest temperature in Incheon of 18–20°C on October 5, driven by northwest winds and clearing skies after early-week rain. This positions 19°C and 20°C as the leading market outcomes, with the former holding the strongest implied probability amid typical autumn variability. Daytime highs are projected near or slightly below seasonal averages following cooler mornings, while brisk westerly flow and partial cloud cover limit warming potential. Traders are monitoring updated model runs and KMA briefings for any shifts in steering patterns or precipitation timing that could alter the peak reading before market resolution.