Recent forecasts from meteorological models indicate Shanghai's August 21 high will likely fall in the 30–31°C range, reflecting typical late-summer subtropical conditions with elevated humidity and moderate instability. Afternoon thundershowers or increased cloud cover, noted in multiple extended outlooks, could cap peak temperatures by limiting solar heating, while clearer intervals might allow brief spikes toward 32°C. Trader consensus around these values aligns with historical August averages near 32°C and the narrow two-day forecast window, where small shifts in steering patterns or convective timing introduce the main uncertainty. Updated model runs and official briefings from agencies like the China Meteorological Administration will refine the outlook before resolution.