Forecast consensus points to a minimum temperature of 26–27°C in Guangzhou on September 26, with light southerly winds, high humidity near 70–85%, and partly cloudy to clear skies limiting nocturnal radiative cooling in this subtropical late-summer regime. Official model runs show stable overnight lows around 26–28°C amid weak pressure gradients and no approaching cold fronts or significant cloud cover to alter heat retention. The tightly clustered market-implied odds reflect genuine uncertainty between adjacent thresholds, as small differences in boundary-layer mixing, urban heat island effects, or microscale wind shifts can tip the observed minimum by 1°C. Updated guidance from regional meteorological agencies later today will likely refine these projections before resolution.