Traders are pricing 35°C and 36°C as the most likely highs for Guangzhou on July 10 because short-range numerical weather prediction models from agencies including the China Meteorological Administration currently converge on maximum temperatures in that narrow range amid typical mid-July subtropical conditions. Persistent influence from the western Pacific subtropical high is supporting warm, humid air advection from the South China Sea, while moderate southwesterly flow and afternoon convective development introduce uncertainty: scattered thunderstorms can limit peak heating through cloud cover and evaporative cooling, potentially capping the daily maximum at 35°C, whereas stronger subsidence or delayed convection could allow readings to reach 36°C. Ensemble spreads remain modest two days out, consistent with historical July variability where daily highs average near 32–33°C but frequently reach 35–36°C under comparable synoptic setups. Updated CMA and global model runs expected on July 9 will likely refine the precise threshold by clarifying precipitation timing and boundary-layer moisture.