Forecast models and official guidance from sources like the Chengdu Meteorological Observatory point to a high of 26–28°C on September 26 under mostly cloudy skies with scattered showers possible, keeping solar insolation limited and surface heating modest amid high humidity near 80% and light northeasterly flow. Recent days have seen similar maxima around 27°C, with the Sichuan Basin’s moisture trapping and weak steering winds reducing diurnal warming potential. The close market split between 28°C and 29°C reflects uncertainty in exact cloud breaks or rainfall timing that could add or subtract 1–2°C from the peak, while probabilities drop sharply above 30°C given the entrenched autumn rain pattern and lack of strong subsidence. Updated model runs and local observations on the day will refine resolution criteria for the official daily high.