Forecast models for mid-August 2026 place Chengdu's daily maximum near 34–37 °C, reflecting the seasonal influence of the western Pacific subtropical high that sustains warm, humid southwesterly flow across the Sichuan Basin. Recent runs show slight divergence in afternoon convective timing, with isolated thunderstorms potentially developing late on the 15th and moderating peak readings, while clearer periods could support 37 °C or higher. Historical August climatology averages highs around 32–34 °C, but current basin-wide heat and low wind shear favor the upper end of the distribution, explaining the tight clustering of market-implied odds around 36 °C. Updated NMC guidance and ensemble spreads expected in the next 24–48 hours will refine these thresholds ahead of resolution.