Trader consensus clusters tightly around a 27–29°C minimum for Shanghai on July 25, reflecting model spread in nocturnal cooling under the East Asian summer monsoon. Recent ECMWF and GFS runs show variable cloud cover and scattered showers that limit radiative heat loss after daytime highs near 33–35°C, while humidity above 80% and light winds reduce the typical diurnal range. Official guidance from the China Meteorological Administration emphasizes uncertainty in timing of any frontal passage or tropical moisture surge, which could drop the overnight low by 1–2°C or hold it near 28°C. Updated model runs and local observations through July 24 will be key for resolving these thresholds.