**Official forecasts from the Hong Kong Observatory set the baseline for August 24 minimum temperatures at 27°C within a 27–31°C range, driving the tight clustering of market-implied odds around 26–28°C.** A broad low-pressure trough and the nearby influence of Tropical Cyclone Zitan are expected to sustain cloudy conditions, scattered showers, and squally thunderstorms, which limit overnight radiative cooling while increasing humidity and wind speeds from the south-southwest. These factors create narrow uncertainty bands, as heavier rainfall could enhance evaporative cooling toward 26°C, whereas clearer intervals might hold the minimum near 28°C. Model consensus remains close given the short lead time, with traders weighting official guidance heavily against historical August minima near 26–27°C and the high probability of precipitation that day.