Current ensemble forecasts for Shanghai indicate overnight lows clustering near 27–28°C on July 14, driven by the East Asian summer monsoon’s persistent moist air mass and elevated humidity that limits nocturnal radiative cooling. Subtropical baseline conditions, with typical mid-July minima around 25–27°C per long-term climatology, are modulated by variable cloud cover and any residual effects from early-July rainfall or distant typhoon activity, which can raise minima by 1–2°C. Traders weigh model consensus on steering patterns and precipitation timing against historical variability, where brief clear spells allow drops toward 25°C while sustained humidity pushes readings higher; updated runs from the China Meteorological Administration and global models over the next 48 hours remain the key near-term catalyst.