Recent official guidance from the China Meteorological Administration and supporting models indicates a maximum near 31–33°C for Beijing on August 19 under late-summer subtropical high pressure, with light southerly flow and moderate humidity supporting daytime heating. Afternoon convection or isolated thundershowers, typical of the East Asian monsoon regime, introduce the main uncertainty by increasing cloud cover and triggering evaporative cooling that can cap the peak. Historical August climatology centers on 30–31°C, yet persistent regional warmth and variable insolation keep probabilities tightly clustered around 31–33°C. Minor differences in model timing of showers or urban heat-island amplification at the official station explain the near-even market distribution, with updated runs expected to sharpen resolution before the date.