Official forecasts from the Korea Meteorological Administration and international models converge on a maximum of 29–30 °C for Incheon on August 28, with mostly cloudy skies and periods of showers or thunderstorms expected to limit solar heating and keep temperatures in check. High humidity and light southerly winds further moderate daytime peaks while maintaining elevated overnight lows near 24–25 °C. These conditions align with late-August climatology for the region, where average highs hover around 29 °C but can fluctuate with precipitation timing. Trader emphasis on the 30 °C and 31 °C bins reflects this narrow forecast range and limited upside potential absent a clearing trend, while residual uncertainty in exact peak timing sustains smaller probabilities for 29 °C or 32 °C.