Recent forecasts from multiple models point to widespread showers and increased cloud cover moderating maximum temperatures in Chengdu on August 29 to the 28–30 °C range, explaining the tight clustering of market-implied probabilities around 28–29 °C. The Sichuan Basin’s enclosed topography, weak winds, and high humidity typically amplify daytime heating, yet enhanced monsoon-driven convection and rainfall expected that day introduce cooling through evaporative processes and reduced solar insolation. Model spread arises from uncertainty in the timing and intensity of localized thunderstorms, which can shift the daily peak by 1–2 °C depending on whether heavy rain arrives before or after peak heating. Official guidance from Chinese meteorological agencies highlights this variability, with traders weighting the consensus toward slightly below recent peaks near 32–34 °C. Updated model runs and regional radar trends in the next 48 hours will likely refine these odds further.