Karachi's coastal Arabian Sea location and ongoing southwest monsoon drive high uncertainty in the August 24 overnight minimum, with model spreads and variable cloud/rain cover creating nearly even odds between 21°C or below and 31°C or higher. Persistent high humidity (often 70-80%) and sea breezes typically moderate temperatures toward the long-term August average low near 26-27°C, but stronger monsoon lows or clearer skies could allow greater diurnal cooling or heat retention. Historical records show occasional dips to 21°C during enhanced rainfall events, while drier intrusions push minima higher; traders weigh the latest Pakistan Meteorological Department guidance and ensemble forecasts for land-sea thermal contrasts and precipitation timing that will resolve the market.