Recent forecasts from multiple meteorological sources indicate Guangzhou's overnight minimum on September 13 will likely settle near 25–27°C amid persistent cloud cover, high humidity near 80–90%, and scattered thunderstorms associated with a subtropical weather pattern. These conditions limit radiative cooling, keeping temperatures elevated compared to clearer nights, while light variable winds offer little additional mixing. Historical averages for the date hover around 24.4°C, but current model runs show a narrow range centered slightly above that baseline due to the active moisture. Trader consensus clusters tightly on 25–27°C because small differences in exact timing of rain or observational minima at official stations can shift the recorded low by 1–2°C, with lower probabilities assigned to cooler outcomes absent a stronger frontal passage. Updated guidance from agencies like the China Meteorological Administration will refine this range as the night progresses.