Official observations from the Shenzhen Bao'an International Airport's automated weather station, as documented by Weather Underground, recorded a maximum temperature of 25°C on May 9, anchoring trader consensus at 100% implied probability for that outcome. Persistent cloud cover and light winds throughout the day suppressed solar heating, yielding a high well below Shenzhen's early May climatological average of 28–29°C, consistent with regional reports of hazy conditions from the China Meteorological Administration. This skin-in-the-game positioning reflects verified data over pre-event forecasts anticipating mild warming. Realistic challenges are minimal but could include rare post hoc data audits uncovering sensor anomalies or transcription errors, though automated station records rarely change.