The market-implied odds, with 31°C leading at 32% followed closely by 32°C and 30°C, reflect trader assessment of ongoing southwest monsoon (Habagat) conditions that typically cap Manila daytime maxima near 30–32°C through persistent cloud cover, scattered showers, and thunderstorms. Recent PAGASA outlooks for August 23–24 indicate 60–90% rain chances across Metro Manila amid the monsoon trough, which limits solar insolation and promotes evaporative cooling, consistent with observed highs of 31–32°C in preceding days. Key variables include monsoon intensity and timing of convective activity: clearer breaks could allow brief warming toward 33°C or higher if subsidence reduces cloud fraction, while heavier localized downpours or embedded disturbances would enhance cooling and favor sub-30°C outcomes. High humidity (>80%) and urban heat-island effects add minor upward bias but are secondary to radiative and advective influences; model consensus remains uncertain this close to the date given potential shifts in steering flow or rainfall distribution.