**Singapore's equatorial location produces consistently warm nights with limited diurnal temperature variation, typically seeing minimums around 25–27°C in August under the prevailing southwest monsoon.** Current forecasts for August 25, 2026, from sources including the National Environment Agency (NEA) outlook and numerical models indicate nighttime lows near 27–28°C, consistent with recent observations where minima have frequently stayed above 27°C amid above-average temperatures and below-average rainfall. Persistent high humidity (often 80–90% overnight), light southeast winds, and variable cloud cover from localized thundery showers limit radiative cooling, keeping the air mass from dropping sharply before dawn—the usual timing for the daily minimum. The closely matched market odds around 27–28°C reflect this baseline, while the notable probability attached to 23°C or below captures residual uncertainty from potential model shifts, heavier overnight rain enhancing evaporative cooling, or localized microclimate effects. Stronger monsoon winds or clearer skies could allow slightly more cooling, but climatological norms and current guidance make extremes below 25°C unlikely without a significant pattern change. Updated official forecasts and model runs over the next 48 hours will provide the key inputs for resolution.