Forecast models from multiple sources indicate a high near 31–32°C for Guangzhou on September 13, with a 30–90% chance of thunderstorms and increased cloud cover that could limit peak solar heating and moderate temperatures through evaporative cooling. Trader consensus, reflected in the closely matched implied probabilities for 31–34°C outcomes, centers on this range given current subtropical conditions, northeasterly flow, and typical mid-September variability around the 32.2°C historical average high. Key differentiating factors include storm timing, which may suppress the daily maximum if convection develops earlier, versus clearer intervals allowing brief warming toward 34°C. Updated model runs and observational data over the next 48 hours will likely refine these probabilities as the event approaches.