**Trader consensus around 35–37°C for Guangzhou’s August 16 maximum reflects typical late-summer subtropical conditions in the Pearl River Delta, where seasonal highs average 33–34°C but frequently reach 35–36°C under weak steering flow and high humidity.** Short-range models indicate widespread afternoon thunderstorms and showers on the 16th, which can suppress peak temperatures through cloud cover and evaporative cooling while still allowing brief sunny intervals to push readings into the mid-30s. Recent observational trends show persistent warm, moist air masses with dew points supporting heat indices well above actual air temperatures. Differentiation among the tightly bunched 35°C (25.5%), 36°C (30.5%), and 37°C (19.5%) outcomes hinges on the precise timing and coverage of convection versus any brief clear periods, factors that numerical guidance updates in the next 24–48 hours will clarify. Market-implied odds therefore embed realistic uncertainty inherent to convective forecasting rather than a strong directional bias.