HKO climatology indicates mean May minimum temps typically range 23-24°C. A sub-20°C nocturnal dip necessitates an anomalous continental cold surge or robust northerly advection, both exceedingly rare post-April as the seasonal transition progresses. Current ensemble model output projects no significant negative thermal anomalies impacting the Pearl River Delta. The prevailing monsoonal influence mitigates any sustained deep-layer cooling. 95% NO — invalid if a strong, late-season mid-latitude trough stalls over South China.
HKO climatology indicates mean May minimum temps typically range 23-24°C. A sub-20°C nocturnal dip necessitates an anomalous continental cold surge or robust northerly advection, both exceedingly rare post-April as the seasonal transition progresses. Current ensemble model output projects no significant negative thermal anomalies impacting the Pearl River Delta. The prevailing monsoonal influence mitigates any sustained deep-layer cooling. 95% NO — invalid if a strong, late-season mid-latitude trough stalls over South China.
