**Trader sentiment for Singapore’s lowest temperature on August 23 reflects the typical equatorial monsoon climate tempered by short-term forecast uncertainty.** Singapore’s daily minimums normally occur just before dawn under the influence of radiative cooling, modulated by cloud cover, humidity, wind from the prevailing southwest monsoon, and any overnight showers. Current official outlooks from the Meteorological Service Singapore and NEA point to fair, occasionally windy conditions with nighttime lows near 25–27 °C, consistent with August climatology where average daily minima sit around 25.3 °C. Drier southwest-monsoon airflow in the first half of August has reduced cloudiness on some nights, allowing modestly enhanced cooling, yet models still cluster above 24 °C. The elevated 44 % market-implied probability on 22 °C or below likely captures tail-risk scenarios from clearer skies or localized rain-cooled air masses, while the clustering around 25–27 °C aligns with the most probable range from ensemble guidance. New model runs and NEA’s next 4-day outlook are the key near-term catalysts that could shift these odds.