Forecast models from agencies like the China Meteorological Administration indicate Shanghai's August 20 high will likely reach 30–32°C, driven by persistent subtropical high pressure and moist monsoon airflow typical for late summer. Recent Typhoon Dolphin passage brought heavy rain and cloud cover through mid-August, cooling surface temperatures via reduced insolation and evaporative effects while maintaining high humidity around 70–80%. Ensemble predictions show minor variability from steering winds and diurnal heating, with 30°C favored if showers persist and 31–32°C if clearer skies allow greater solar warming. Historical August averages near 31°C provide context, but short-range updates on precipitation timing remain key resolution factors for this narrow market spread.