Recent PAGASA guidance and model consensus point to persistent cloud cover and moderate-to-heavy rainfall over Metro Manila on August 5 from the Southwest Monsoon, enhanced by Tropical Cyclone Luis, which is limiting daytime solar heating and capping maximum temperatures near 29–30 °C. In Manila’s tropical wet-season regime, sustained convection and high humidity reduce surface insolation and promote evaporative cooling, keeping daily highs below the long-term August average of ~31 °C. Trader sentiment clusters tightly around 28–29 °C because small differences in rainfall timing or intensity on the day can shift the observed maximum by 1–2 °C, while drier breaks remain possible but less likely given current steering patterns and moisture convergence. Updated model runs and PAGASA’s next advisory will refine these thresholds ahead of market resolution.