Official forecasts from the China Meteorological Administration and supporting numerical models show Beijing’s maximum temperature on September 25 reaching precisely 26°C under partly cloudy to rainy conditions with light southerly flow. This consensus arises from current surface observations recording afternoon peaks near that threshold, limited solar heating from cloud cover, and seasonal transition patterns that suppress stronger warming. Trader positioning at 100% implied probability for 26°C reflects this tight model agreement and real-time data alignment. A rapid clearing of skies or unexpected wind shift enhancing advection could allow modest overshoot, though the narrow uncertainty range in latest runs makes such outcomes improbable before resolution.