Singapore’s official meteorological service data and real-time station observations have driven near-certain market consensus on a 32°C daily maximum for August 16, consistent with the tropical maritime climate’s typical August range of 31–33°C under moderate El Niño influences that suppress rainfall and favor slightly elevated warmth. Drier-than-average conditions in the first half of the month, as outlined in late-July NEA advisories, produced highs clustered around this level on preceding days, with convective timing and model consensus limiting excursions above 33°C. The market-implied 100% probability reflects traders’ aggregation of skin-in-the-game assessments of these stable atmospheric patterns ahead of the official station data release that resolves the contract. A late-afternoon surge from localized heating or a revision in the final recorded maximum could still alter the outcome.