Official forecasts from the Korea Meteorological Administration and international agencies such as the Met Office project a daytime high of 29°C for Seoul and Incheon on September 5 under clear skies and light northeasterly flow typical of early autumn. This aligns with observed morning lows near 19–21°C and rapid daytime warming under low humidity, producing market-implied odds of essentially 100% for the 29°C threshold. Historical September averages for the region hover near 26–27°C, supporting the current positioning as conditions remain stable with minimal cloud cover or precipitation risk. Final resolution depends on verified maximum readings from official stations; minor model revisions or localized microclimate effects could theoretically shift the outcome, though current data show strong convergence.