Current forecasts from regional models and the China Meteorological Administration point to a minimum temperature in Guangzhou of 25–27°C on August 21, driven by persistent East Asian monsoon moisture, high humidity near 95%, and widespread cloud cover that limits overnight radiative cooling. Scattered thunderstorms and light northeasterly flow further moderate the diurnal range, keeping the low from dropping toward the lower end of the historical August distribution. Trader consensus across the closely matched 25–27°C outcomes reflects uncertainty in boundary-layer details—such as exact cloud timing, urban heat-island effects at official stations, and model spread in steering patterns—rather than any single disruptive event. Updated CMA guidance and late-day observations will likely resolve the narrow spread before market close.