**Short-term forecast models from the Korea Meteorological Administration and international sources indicate a daytime maximum near 28–29°C for Incheon on September 5, driven by clear to partly cloudy skies, moderate easterly to northeasterly winds of 7–10 m/s, and transitional early-autumn conditions following recent highs of 29–31°C.** These patterns favor typical solar heating under high pressure with limited moisture, producing diurnal ranges of roughly 8–10°C and minimal precipitation risk below 10%. Historical September baselines around 26–28°C provide context, yet slight model spreads in cloud timing or wind strength create genuine uncertainty that supports the market’s near-even split between sub-24°C and 32°C+ outcomes versus the clustered 25–31°C probabilities. Updated model runs and official briefings over the next 48 hours will likely refine the exact peak before resolution.