**Market-implied odds favor a 33°C high (51%) on August 31, followed by 32°C (34%) and 34°C (11%).** These probabilities reflect trader consensus on Singapore’s late-August conditions under prevailing southwest monsoon flow, with southeasterly or southwesterly winds, high humidity, and afternoon thundery showers that typically cap daytime maxima. Official Meteorological Service Singapore guidance for the second half of August projects daily highs of 33–34°C on most days, occasionally reaching 35°C, consistent with the month’s observed +1.6°C departure from the 28.1°C normal mean and frequent 33–34°C readings through mid-to-late August. Short-range model output for August 31 shows highs near 31–32°C (roughly 88–90°F) under partly cloudy skies with 60–70% storm chances, but the broader seasonal context and recent above-average warmth support the 33°C outcome as the most probable single value. Key variables include cloud cover and timing of showers, which can suppress peaks by 1–2°C, versus clearer periods allowing stronger insolation. Historical analogs place late-August maxima around 31–32°C, yet 2026’s warmer baseline shifts the distribution upward. Updated forecasts and any new observational data in the final 48 hours before resolution will be the primary drivers of further market movement.