**Persistent cloud cover and moderate westerly winds from the Arabian Sea are the main drivers keeping Karachi's overnight lows near 26–27°C on August 30, consistent with late-monsoon patterns.** Official forecasts from sources like the Met Office and ensemble models show nighttime minima around 26°C under mostly cloudy skies, limiting radiative cooling, while daytime highs reach 30–31°C. Historical August averages feature similar lows near 27°C, with recent observations confirming minima of 26–28°C amid haze and steady 15–20 mph winds that mix the boundary layer and suppress sharp drops. The tight clustering of market-implied odds around 25–28°C reflects model consensus on these conditions, with differentiation hinging on subtle variations in cloud thickness, wind speed, and any last-minute steering changes. A clearer or calmer night could push the low toward 24–25°C, whereas thicker clouds or stronger flow might hold it at 27–28°C or higher. No major shifts in sea-surface temperatures or monsoon activity have altered this outlook in the past week.