Recent forecasts for Hong Kong on September 1 point to a daytime maximum near 30–31°C, with market odds closely split because models show modest variability in peak timing amid widespread cloud cover and showers. A broad low-pressure trough over the northern South China Sea is driving atmospheric instability, favoring scattered thunderstorms that can deliver brief cooling through downdrafts or allow brief sunny intervals to push readings higher. High humidity (dew points near 25–26°C) and northeasterly winds of 10–20 km/h further moderate extremes by limiting surface heating while sustaining muggy conditions. Official Hong Kong Observatory guidance and updated global model runs over the next day will clarify whether convection suppresses the peak below 31°C or permits a brief spike to that threshold.