**Trader consensus favoring 33°C (53.5% implied probability) for Singapore’s highest temperature on August 31 reflects the Meteorological Service Singapore fortnightly outlook for daily maxima of 33–34°C during the second half of August under prevailing southwest monsoon conditions, with a few days potentially reaching 35°C.** Recent observations show consistently above-normal highs (often 33–34°C, peaking at 34.3°C mid-month) amid below-average rainfall and enhanced insolation, reinforced by moderate-to-strong El Niño conditions that have sustained warmth and dryness across the Maritime Continent. Afternoon thundery showers remain possible but are not expected to substantially suppress the peak reading at the Changi reference station. Historical climatology places the typical August 31 maximum near 31°C, so the current elevated baseline and official guidance explain why 32°C and 34°C bracket the leading outcomes while lower or higher extremes carry minimal market weight. Updated model runs and the next daily forecast will provide the primary near-term catalyst for any probability shifts.