Trader consensus has settled decisively on 26°C as Chengdu’s highest temperature for September 30, driven by official meteorological observations and model consensus from agencies tracking regional conditions. Current data show typical late-September atmospheric stability over the Sichuan Basin, with daytime maxima aligning precisely at this level amid moderate humidity and light winds that limit further warming. Historical climatology for the period supports averages near 25–27°C, reinforcing the positioning. The only realistic challenges would involve post hoc measurement revisions by monitoring stations or an unforeseen late-day surge from localized convective activity, though neither appears likely given the closing forecast window.