Traders have converged on 30°C as the highest temperature recorded in Hong Kong on May 23, reflecting official Hong Kong Observatory observations that placed the daily maximum precisely at this level under generally fine conditions driven by an anticyclone. This consensus aligns with typical late-May climatology in the region, where highs often reach the upper 20s to low 30s Celsius amid rising seasonal warmth and moderate humidity. Near-certainty stems from direct instrumental measurements at multiple stations, with minimal scope for revision unless post-analysis adjustments to raw data emerge. Realistic challenges remain limited to rare calibration discrepancies or localized microclimate variations, though historical precedents show such markets resolve cleanly once verified reports are finalized.