Singapore's tropical climate under prevailing southwest monsoon conditions keeps daily minimum temperatures tightly clustered, with official forecasts from the Meteorological Service Singapore and NEA indicating overnight lows near 25–27 °C for 22 August amid drier-than-average conditions and fair skies that permit moderate nocturnal cooling. Recent model consensus points to clear to partly cloudy skies with light southeasterly winds, limiting cloud cover that would otherwise trap heat, while high humidity and urban heat-island effects prevent deeper drops below the climatological August baseline of roughly 25 °C. The closely matched market probabilities for 26–28 °C reflect this narrow range, where small variations in wind speed, localized shower timing, or radiative cooling under clearer spells could shift the recorded minimum by 1 °C. Updated short-range guidance later on 21 August will provide the final inputs before resolution.