Traders see closely matched probabilities across 31–33°C because short-range ensemble forecasts for Guangzhou on July 9 show high uncertainty in peak daytime temperatures amid typical East Asian monsoon conditions. Afternoon convective showers or increased cloud cover can suppress maxima by 1–2°C, while clearer, drier air masses allow readings to reach 33°C or higher under strong solar heating. Historical July averages near 32°C, combined with urban heat-island effects and variable humidity, keep the distribution tight around these thresholds, with new model runs from agencies such as the China Meteorological Administration likely to shift sentiment as the date approaches.