**Pakistan Meteorological Department forecasts indicate a maximum of 36–38°C for Karachi on September 23, following dissipation of a persistent low-pressure system that had blocked sea breezes and driven the prior day’s record 40.7°C reading.** Official observations from multiple stations on September 22 confirmed the hottest September day in nine years, with humidity amplifying the heat index. The system’s breakdown has allowed gradual cooling, aligning with climatological expectations for late September as monsoon influences wane. Model consensus and PMD guidance support this range, though exact station-specific maxima can vary by 1–2°C due to local microclimates or measurement timing. An unexpected redevelopment of the low-pressure area or delayed sea-breeze return could push readings higher, but current atmospheric conditions make that unlikely.