Forecasts from the Hong Kong Observatory and regional models point to overnight lows near 27–28°C on August 17, establishing these as the leading outcomes with combined implied probability above 65%. Persistent subtropical high pressure and a warm, humid air mass limit nocturnal radiative cooling, consistent with typical mid-August climatology where average minimums range 26–28°C. Scattered showers or thunderstorms may enhance cloud cover and further moderate temperature drops without introducing significant cooling. Trader consensus, reflected in the 49% probability on 28°C, incorporates these stable conditions alongside seasonal baselines and the absence of atypical frontal systems or stronger winds that could alter the minimum.