The overwhelming 100% market consensus on 32°C reflects the Hong Kong Observatory’s official maximum temperature reading for September 9, confirmed through verified station data under typical late-summer conditions with moderate humidity and light winds. Real-time observations showed daytime peaks aligning precisely with this threshold, consistent with regional steering patterns and the absence of significant cooling influences like stronger monsoon flows. Traders price in this outcome because prediction markets aggregate capital-backed assessments of authoritative meteorological records, which carry low uncertainty once the observation period closes. Only an unusual post-processing revision to the daily maximum by the Observatory could realistically shift resolution, though historical precedent indicates such changes are infrequent.