Recent forecasts from multiple models, including PAGASA-influenced guidance, indicate Manila's overnight low on August 21 will likely fall between 27–28°C amid persistent monsoon moisture, widespread cloud cover, and scattered showers that limit nocturnal radiative cooling. High humidity near 80–95% and light southwesterly winds further suppress temperature drops in this tropical setting, where typical August lows average around 25–26°C but current conditions favor warmer readings. Model consensus and recent observations from the prior 24–48 hours position 28°C as the modal outcome, with 26–27°C remaining plausible if clearer breaks allow modest additional cooling before dawn. Market-implied probabilities align with these near-term data, as traders weigh the narrow diurnal range and resolution criteria tied to official station measurements.