Recent heavy rainfall and thunderstorm activity across the Pearl River Delta, including ongoing alerts from the Shenzhen Meteorological Bureau, have increased cloud cover and evaporative cooling, moderating peak temperatures toward 33–34°C on August 29. Subtropical monsoon conditions with high humidity and weak steering winds favor scattered convection that limits insolation, though earlier clearing could allow brief afternoon heating toward 35°C. Ensemble forecasts show modest spread driven by precipitation timing and local boundary-layer mixing, aligning with the market’s tight clustering around 33–34°C rather than historical August averages near 32°C. Updated model runs and local observations will refine resolution criteria before market close.