Traders assign the highest probabilities to 34–36°C for Guangzhou’s peak temperature on August 17 because short-range models and local observations point to continued hot, humid subtropical conditions typical of mid-August, tempered by scattered thunderstorms that introduce variability. Persistent high moisture content from the East Asian monsoon maintains elevated dew points and limits nocturnal cooling, while urban heat-island effects and insolation under partly cloudy skies can push afternoon maxima into the mid-30s. Recent days have featured highs near 33–35°C with intermittent rain, and forecast spreads reflect uncertainty over exact cloud cover and precipitation timing—factors that can suppress or allow brief clearing sufficient for an extra degree. Official Guangzhou meteorological guidance and historical August baselines around 31–33°C provide context, yet the tight clustering of leading outcomes underscores genuine short-term forecast dispersion rather than a single dominant signal.