Recent Hong Kong Observatory forecasts indicate a southwesterly airstream bringing sunny periods with isolated showers on August 13, supporting a daytime range of 29–33°C and implying overnight minima near 27–29°C. These conditions limit nocturnal radiative cooling due to elevated humidity and cloud cover, keeping the lowest temperature tightly clustered around the market's leading 28°C and 29°C outcomes. Historical August baselines average 26–27°C for minima, but current model guidance and the absence of strong northerly winds or clear skies favor slightly higher values. Traders monitor the next HKO bulletin and any revised numerical weather prediction runs for shifts in shower timing or wind patterns that could alter the minimum by 1°C.