Recent forecasts from multiple meteorological models indicate a daytime high near 37°C for Guangzhou on September 30, driven by persistent subtropical high pressure, clear skies, and strong solar heating amid late-season warmth that exceeds the 1991–2020 average high of 30.8°C. Light southerly winds and low precipitation chances (under 40% in most runs) limit cooling from cloud cover or storms, while dew points near 27–28°C support elevated heat indices. Market-implied probabilities align closely with this consensus, though afternoon convective development or minor model spreads could shift the peak by 1°C, with resolution hinging on official station readings at the end of the day.