**Recent official forecasts from the Hong Kong Observatory (HKO) and other models position 26°C as the most likely minimum temperature on August 31, 2026, consistent with the market's leading 38.5% implied probability for that outcome.** A broad trough of low pressure over the northern South China Sea and Guangdong coast continues to drive unsettled conditions, with generally cloudy skies, scattered showers, and thunderstorms expected through Monday. This pattern supports the HKO's explicit forecast of a 26°C low (alongside a 30°C high) under east-to-northeast winds of force 4, occasionally stronger offshore or on high ground. Multiple independent sources, including Met Office guidance and numerical models, converge on overnight minima of 25–27°C, reflecting high humidity (75–95%), persistent cloud cover that limits radiative cooling, and rain-cooled air masses. These factors explain the tight clustering of market-implied odds around 25–27°C, with lower probabilities assigned to extremes (e.g., 24°C or below at ~26.5% combined, or 28°C+ at ~13%). The current trough influence and elevated rain probability on August 31 heighten the chance of a slightly cooler night compared to clearer conditions, while typical late-August climatology (nighttime lows near 26–27°C) anchors expectations absent any rapid change in steering flow or tropical cyclone development. Updated model runs or HKO briefings over the next 48 hours could shift probabilities if rainfall timing or wind shifts alter boundary-layer temperatures.