Divergent short-range numerical weather prediction outputs from models including CMA, ECMWF, and GFS ensembles drive the tight clustering around 35–37 °C for Chongqing’s August 22 high, with 36 °C holding the highest implied probability. Persistent high humidity (55–70 %), light easterly winds, and widespread cloud cover from scattered afternoon thunderstorms limit peak solar insolation and introduce convective cooling that can shave 1–2 °C off maximum readings. Recent official guidance notes 37–38 °C potential absent widespread rain, yet latest runs show elevated thunderstorm coverage over central districts that favors slightly lower peaks near 35–36 °C. Traders weigh these variables against climatological August averages near 31 °C, recognizing that final resolution hinges on the precise timing and intensity of convection observed by local stations.