**Persistent southwest monsoon (habagat) conditions, enhanced by a nearby low-pressure area (LPA), are the dominant driver keeping Manila’s overnight minimum temperatures clustered around 26–27 °C for August 30.** Official PAGASA analyses and multiple forecast models show continued cloudy skies, scattered to occasional rains, and moderate-to-strong southwesterly winds across Metro Manila through the weekend. These factors limit nighttime radiative cooling: thick cloud cover traps heat, high relative humidity (typically 85–95 %) reduces the temperature drop, and steady winds promote mixing that prevents sharp surface cooling. Recent observations already record daily minima near 26.4 °C, consistent with typical August climatology under active monsoon flow. Forecast guidance places the Aug 30 low in the 26–28 °C range (roughly 79–82 °F), with little model spread for significant further cooling or warming. The LPA east of northern Luzon is expected to intensify the monsoon but remains too distant to introduce major cold advection or clear-sky breaks that would allow temperatures to dip toward 24 °C or below. Higher outcomes (28–29 °C) would require an unexpected reduction in cloud cover or wind, which current patterns do not support. Traders therefore assign the highest probabilities to the narrow 26–27 °C band, reflecting both the scientific consensus on monsoon-driven stability and the narrow uncertainty window only two days before resolution. Updated PAGASA bulletins and short-range model runs on Aug 29–30 will be the key near-term catalysts.