**Official forecasts from the Hong Kong Observatory point to a minimum of 27–28°C on August 23, aligning with the market's tight leading probabilities (37% for 27°C, 30.5% for 28°C).** Persistent summer monsoon conditions, southwesterly winds, and high humidity (70–95%) are limiting nighttime radiative cooling across the territory. Recent model consensus shows mainly cloudy skies with scattered showers or thunderstorms, which trap heat and keep overnight lows elevated compared with drier periods. Climatologically, August minima average near 26–27°C, but the current setup—broad troughs of low pressure over the South China Sea and above-normal seasonal temperatures—favors the upper end of that range. Traders appear to be weighting the HKO's explicit 27°C floor most heavily while acknowledging small model spread that could push the reading to 26°C or 28°C depending on exact cloud cover and wind speed overnight. No major tropical cyclone influence is expected to alter the pattern before the 23rd.