**Current southwest monsoon conditions, with southeasterly to southwesterly winds and elevated humidity, are the dominant factor holding overnight minima near 26–28 °C for September 2.** Official and model guidance (GFS, ECMWF, local forecasts) consistently project early-morning lows of 26–27 °C under partly cloudy to mostly clear skies, limiting radiative cooling while sea-surface temperatures near 30 °C maintain a warm boundary layer. Scattered afternoon thunderstorms may enhance evening cloud cover, further moderating the diurnal drop, though any brief clear spells could allow brief dips toward 25 °C. Historical early-September climatology shows average minima of 25.2 °C, with recent months trending slightly above average amid the ongoing monsoon and possible El Niño influence. Market-implied odds clustered around 26–28 °C versus 32 °C+ reflect genuine forecast uncertainty in exact cloud timing and local wind speeds, which control the final minimum recorded at official stations. Updated model runs and the next Singapore Meteorological Service briefing will be the key near-term catalysts.