Forecast models show notable divergence for Wuhan's overnight low on September 16, with some projecting minima near 18–20°C amid increasing cloud cover and light easterly winds, while others indicate stronger cooling to 17°C or below if a frontal boundary arrives earlier. Recent observations note a gradual temperature decline from mid-September peaks above 30°C, driven by shifting subtropical high pressure and rising humidity that limits nighttime radiative cooling. Precipitation chances remain low during the day but increase overnight, potentially accelerating the drop depending on exact timing and model runs from agencies like the China Meteorological Administration. This uncertainty between mild transitional conditions and sharper cooling explains the near-even market split between sub-18°C and higher outcomes. Updated model guidance ahead of the date will likely clarify the primary variables of wind shear and cloud persistence.