Recent forecasts from the Hong Kong Observatory and models indicate overnight lows near 27–28°C for August 22 amid typical subtropical monsoon conditions, with scattered thunderstorms and high humidity limiting radiative cooling. This aligns with the market's leading 27°C outcome at 41.5% implied probability, followed by 26°C and 28°C, as above-normal seasonal temperatures persist without significant frontal systems or typhoon influences to drive sharper drops. Historical August minima average around 26–27°C, and current guidance shows no major model shifts or unexpected cooling trends that would elevate lower-probability outcomes like 25°C or below. Traders are monitoring the next HKO update for any refinements to the 24-hour forecast window.