Recent ensemble forecasts from global models place Shenzhen's October 9 maximum near 30–31 °C under easterly flow and partly cloudy skies, driving the near-even trader split between those two outcomes. Subtle differences in afternoon cloud cover, boundary-layer mixing, and the strength of the urban heat island effect create the narrow gap separating the leading probabilities. With no significant weather systems approaching the South China coast and typical late-autumn subtropical conditions prevailing, model consensus remains stable yet acknowledges the usual 1–2 °C spread inherent in high-resolution guidance. Updated runs from the ECMWF, GFS, and China Meteorological Administration over the next 24–48 hours will provide the next key inputs for market positioning.