**Trader sentiment for Singapore’s lowest temperature on September 3, 2026, centers on the 26–27°C range (combined ~62% implied probability), reflecting official forecasts of warm, humid nights under prevailing southwest monsoon conditions.** Southeast or southwesterly winds and mostly clear to partly cloudy skies are expected to limit radiative cooling, keeping overnight minima above the seasonal norm in many models. Recent NEA guidance highlights persistent dry weather into early September, with minimum temperatures likely remaining above 27°C on most nights and localized thundery showers possible only in the afternoon—factors that reduce the chance of stronger nocturnal cooling. Differentiation among nearby outcomes (23–28°C) arises from small variations in cloud cover, humidity (typically 80–90% at night), wind speed, and the urban heat island effect at official stations such as Changi Airport. Clearer periods allow more cooling toward 26°C, while increased moisture or light winds favor 27°C or slightly higher. Lower probabilities for 25°C or below reflect the low likelihood of significant rain or unusual atmospheric cooling given current model consensus. Upcoming 24–48 hour forecast updates from NEA/MSS and refined model runs will be the key near-term catalysts for any market shifts.