Ensemble forecast models from major meteorological centers indicate the highest temperature in Beijing on September 28 will most likely fall between 24–26°C, aligning with the market's leading implied probabilities. This range reflects the seasonal transition into early autumn, with moderating daytime highs driven by weakening solar insolation and potential cool-air advection from northern high-pressure systems. Recent observational trends and model consensus show limited deviation from climatological norms for late September, though uncertainty persists around exact frontal passage timing or localized urban heat effects that could nudge readings by 1–2°C. Updated numerical weather prediction runs expected overnight will likely refine these probabilities ahead of market resolution.