Official observations from the Guangzhou Baiyun International Airport meteorological station—the market's resolution source—have confirmed a peak temperature of 23°C on May 5, driving trader consensus to a 100% implied probability for this outcome as the local day concludes. Persistent cloud cover and light rain, as reported by China Meteorological Administration monitoring, suppressed solar insolation and daytime heating, resulting in highs well below the early May climatological average of 29°C amid post-holiday frontal influences over Guangdong. Model consensus from CMA and local forecasts aligned with this subdued pattern throughout the day. While final data validation is pending, a realistic challenge would require an upward revision of preliminary readings from late-afternoon sensors, though evening stability makes this improbable.