**Forecast uncertainty centers on the timing and intensity of expected thunderstorms and increasing cloud cover over Chengdu on August 16, which could cap the daily maximum between 31–33 °C.** Current model consensus from sources such as Time and Date, AccuWeather, and the Met Office shows recent days reaching 35–37 °C under mostly sunny conditions, but guidance for the 16th indicates a shift toward isolated thundershowers or overcast skies that typically reduce peak heating by 2–4 °C through reduced insolation and evaporative cooling. Chengdu’s August climatology features humid subtropical conditions with average highs of 30–34 °C and frequent convective activity driven by the East Asian monsoon; any earlier or stronger precipitation would favor the lower end (31 °C or below), while delayed or lighter storms would support 33 °C or slightly higher. The tight clustering of market-implied odds around 31–33 °C reflects this narrow but meteorologically plausible range, with traders weighting the latest short-range model runs that show modest cooling relative to the preceding heatwave. Updated National Meteorological Center or ECMWF guidance expected in the next 24–48 hours will likely be the key catalyst for further shifts.