Recent forecasts from sources including the China Meteorological Administration and international models indicate persistent cloud cover, moderate to heavy rain, and thundershowers for Guangzhou on September 4, 2026, which are expected to limit solar insolation and evaporative cooling effects, keeping daytime maxima near 23–26°C—well below the early-September climatological average of ~32–33°C. Key variables include the timing and intensity of precipitation bands, which could allow brief clearing and slight warming toward 27–28°C if rain holds off until afternoon, versus cooler outcomes if widespread showers persist. Model consensus shows high uncertainty in exact peak values due to steering patterns and moisture flux, with traders assigning the highest implied probability to 28°C amid these variables while discounting extremes above 30°C or below 25°C. Updated runs from official agencies ahead of the date will likely refine resolution criteria for the daily high.