Recent Pakistan Meteorological Department and international model guidance indicates minimum temperatures in Karachi near 27–28°C on September 25, underpinning the closely matched market between the 28°C outcome and higher ranges. In late September, the city transitions from southwest monsoon influence to drier continental air, with persistent high humidity, moderate westerly to southwesterly winds, and Arabian Sea sea breezes limiting nocturnal radiative cooling. Urban heat retention and partly cloudy skies further stabilize overnight lows around historical averages of 27°C, while the absence of strong westerly disturbances or post-monsoon rain events reduces the chance of sharper drops. Short-term forecast revisions from the PMD or shifts in regional pressure patterns remain the key variables that could alter trader consensus before resolution.