**Recent forecasts indicate Shanghai's overnight low on August 6 will most likely fall in the 27–29°C range, consistent with the market's leading outcomes (28°C at 49.5%, 27°C at 32.5%, 29°C at 16.5%).** Shanghai's humid subtropical climate keeps summer minimum temperatures elevated due to high humidity, urban heat island effects, and limited radiative cooling under cloudy or rainy conditions. Current model consensus and agency guidance point to partly cloudy to overcast skies with scattered showers or thunderstorms, which trap heat overnight and support lows near 27–28°C—aligning with climatological August averages of roughly 25–28°C and recent observations showing consecutive nights at or above 28°C amid an extended heat period. No significant cold-air advection or clear-sky radiative cooling is expected in the next 24–48 hours, keeping probabilities concentrated around these values while limiting chances for outliers below 26°C or above 30°C. Updated short-range model runs and official briefings in the coming hours will provide the final calibration ahead of market resolution.