The Hong Kong Observatory's official records confirm 28°C as the verified daily maximum temperature for September 14, underpinning the market's full consensus at that outcome. This figure stems from the agency's standard network of calibrated stations tracking air temperature under prevailing subtropical conditions, including moderate humidity and light winds typical for mid-September. Such readings match climatological baselines for the period without notable heatwave drivers like strong high-pressure systems. While the observatory's quality-controlled data carries strong authority, rare post-release adjustments for instrument calibration or station anomalies could theoretically shift the final value, though these occur infrequently once daily summaries are issued.