**Trader sentiment for Hong Kong’s lowest temperature on August 3 centers on the narrow 24–25°C range, with market-implied odds of 43.5% for 24°C and 44.5% for 25°C reflecting high uncertainty in overnight cooling.** August in Hong Kong features typical summer conditions of high humidity (often 75–95%), frequent showers, and limited radiative cooling under cloud cover, keeping minimum temperatures close to long-term averages of 25–27°C. Official Hong Kong Observatory guidance and short-range forecasts indicate light rain or showers on August 3 with lows near 25–26°C and highs of 29–31°C, consistent with normal-to-above-normal seasonal temperatures. The near-even split between 24°C and 25°C likely stems from model differences in cloud thickness, rainfall timing, and wind patterns that can enhance or suppress nocturnal cooling by 1°C. Heavier or more persistent rain could push the minimum toward 24°C by limiting temperature drops, while clearer intervals might allow 25°C or slightly higher. With resolution just two days away, updated model runs from the Hong Kong Observatory and global ensembles will be the key near-term drivers.