Recent forecasts for Shanghai indicate nighttime lows around 26–27°C on August 21, aligning with the market's leading outcomes at 52.5% for 27°C and 32% for 26°C. Persistent subtropical summer conditions, including high humidity, urban heat retention, and typical post-monsoon warmth, support these levels, with model consensus from sources like AccuWeather and Met Office showing minimal deviation from climatological baselines of 25–27°C. Scattered showers in the extended outlook may provide slight cooling but are unlikely to drop temperatures below 25°C absent a stronger frontal system. No significant weather shifts have emerged in the past 48 hours to alter this range, keeping trader focus on standard late-August variability rather than anomalous cooling.