**Forecast consensus from the Hong Kong Observatory and multiple models points to an overnight low of 26–27°C on August 30, 2026, aligning with the leading market outcomes (38% for 26°C, 30.5% for 27°C).** A broad trough of low pressure is expected to maintain unsettled conditions with scattered showers and thunderstorms, producing persistent cloud cover that limits nighttime radiative cooling and supports minimum temperatures in this narrow band. High humidity (typically 75–95%) and light southwest winds further reduce the diurnal temperature range, consistent with late-August climatology where average lows sit near 25–26°C. Model agreement is relatively tight on the overall pattern, though small differences in shower timing or localized clearing could nudge the exact minimum by 1°C either way—explaining the close contest between the top two bins and the secondary support for 25°C. Traders are weighting official guidance and ensemble outputs showing the lowest temperature falling in the 26–27°C range under these stable, moist conditions, with lower probabilities assigned to cooler or warmer extremes due to the limited variability expected.