**Recent clearing after widespread rain on August 27–28 has positioned Beijing for mostly sunny skies and light westerly winds on the 29th, supporting a daytime high near the seasonal late-August average of ~29–30°C.** Multiple short-range models converge on afternoon peaks of 30–32°C under building high pressure, with limited cloud cover and dew points dropping into the low 20s helping moderate humidity. Trader sentiment clusters around 31°C (32% implied probability) because official forecasts from Chinese meteorological sources and global ensembles most frequently resolve in that narrow band, while the closely matched 30°C and 32°C shares reflect typical model spread in maximum temperature timing and urban heat-island effects. No anomalous heat advection or blocking patterns are indicated in current guidance.