**Trader consensus has locked onto 28°C as the lowest temperature recorded in Hong Kong on August 28, 2026, at a 99.9% implied probability.** This reflects verified post-event observations from the Hong Kong Observatory (HKO), which measured an overnight minimum of 28°C amid typical late-summer subtropical conditions. A broad low-pressure trough over the South China Sea brought periods of moderate rain and high relative humidity (often 80–95%), limiting radiational cooling. Light to moderate southwest winds and persistent cloud cover kept temperatures from dropping further overnight, with readings holding near 28–29°C through the early morning hours before rising to afternoon highs around 31–32°C. Historical climatology for late August supports minima in this range under similar moist, disturbed flow, and multiple independent weather summaries align with HKO data showing no readings below 28°C. The market-implied odds remain stable because resolution depends on finalized official daily minimum values rather than forecasts or preliminary reports. Only an unexpected data revision or station-specific anomaly (rare at this stage) would realistically alter the outcome.