**Persistent westerly winds, high humidity near 80-87%, and extensive cloud cover are expected to keep Karachi's overnight minimum temperature on August 29, 2026, in the 26-27°C range, consistent with late-monsoon climatology.** Official and model guidance (PMD-influenced forecasts, GFS ensembles, and Met Office) show the daily low occurring in the pre-dawn hours under mostly cloudy skies with light-to-moderate winds of 6-7 m/s from the southwest to west. These conditions limit radiational cooling while elevated moisture and the urban heat-island effect support minima near or slightly above seasonal norms of ~27°C. Recent developments include markedly suppressed monsoon rainfall across Sindh, linked to ongoing El Niño influences that have reduced low-pressure activity over the Arabian Sea, resulting in fewer cooling showers and more stable, humid air masses. This has produced a narrow forecast spread for the 29th, with most guidance clustering between 26-28°C for the lowest reading. Trader sentiment shows dispersed probabilities across the 26-31°C bands because small differences in cloud timing, wind speed, or localized advection can shift the exact minimum by 1-2°C; the low 1% odds below 21°C reflect the strong historical and current barrier of warm sea-surface temperatures and monsoon-season baselines. New model runs and any late-day observational updates from Karachi stations will be the key near-term catalysts.