Forecast models from sources like the China Meteorological Administration and international ensembles point to scattered thundershowers and increasing afternoon cloud cover on August 20, which are expected to limit peak solar heating and cap the daily maximum near 30–31 °C. High humidity and light easterly winds typical of the East Asian summer monsoon further modulate surface temperatures by enhancing evaporative cooling during convective bursts. The narrow spread between the leading 30 °C and 31 °C outcomes reflects uncertainty in the precise timing and coverage of precipitation, as well as minor differences among numerical weather prediction runs regarding boundary-layer mixing and sea-breeze effects near the coast. Historical mid-August averages hover around 31 °C, but recent patterns with frequent convective activity have produced slightly cooler peaks, keeping trader sentiment tightly balanced ahead of updated short-range guidance.