Recent Pakistan Meteorological Department observations and forecasts have established 28°C as the expected overnight minimum in Karachi on September 15, 2026, amid persistently high humidity near 80% and light monsoon-driven showers that limit radiative cooling. Southwest winds and partly cloudy skies have maintained temperatures close to climatological norms for mid-September, with multiple model runs converging on this threshold rather than deeper cooling. The market's 92.5% implied probability for exactly 28°C reflects this consensus from official measurements, though heavier localized rainfall or shifts in the low-pressure system could still produce a 27°C reading at certain stations before midnight.