Multiple ensemble forecast models indicate persistent cloud cover and moderate rainfall across Guangzhou on August 3, limiting surface heating through reduced insolation and evaporative cooling in the region's humid subtropical climate. This supports the market's tight clustering around 30–31 °C as the most probable highs, with the near-even split between those outcomes reflecting remaining uncertainty in precipitation timing and any brief clear spells. Lower probabilities for 32 °C or above align with the low likelihood of significant breaks in the overcast deck, while cooler thresholds account for heavier rain scenarios. Updated model runs over the next 48 hours will refine these boundaries ahead of resolution.