Official Hong Kong Observatory measurements recorded a daily maximum air temperature of exactly 30°C on September 6, 2026, at the primary urban station, with afternoon readings peaking near 30.0°C under partly cloudy skies and light winds. This outcome aligned with pre-event model consensus from regional forecasts projecting highs in the 29–31°C range amid typical late-summer conditions without significant cloud cover or precipitation to suppress heating. Trader positioning at 100% implied probability for 30°C reflects the resolution criteria tied directly to verified observatory data rather than forecasts or unofficial reports. Minor adjustments could theoretically arise from post-processing quality checks, though such revisions are rare for standard maximum temperature records once published.