Persistent subtropical monsoon conditions and high humidity levels typical of late August in Guangzhou are positioning overnight lows near 25–27°C for August 24, according to consensus forecasts from sources such as AccuWeather and the Met Office. Frequent thunderstorms and moderate rain expected over the next 48 hours introduce modest cooling potential through cloud cover and evaporative effects but are unlikely to drive minima below 23°C given the warm, moist air mass and lack of any strong frontal systems. Trader emphasis on the 20°C-or-below outcome at 42% implied probability appears driven by uncertainty around rainfall intensity and model spread in short-range guidance, while clustered probabilities around 25–29°C align closely with climatological baselines and current ensemble runs. Updated model outputs and official observations on August 23 will provide the next key data points for resolution criteria based on the daily minimum temperature.