Forecast consensus from the Hong Kong Observatory and numerical models points to a daily minimum near 28°C on September 30, driven by light southwest winds, high humidity near 80-90% overnight, and mostly clear to partly cloudy skies that limit radiative cooling. Current observations show overnight lows holding around 27-28°C amid stable subtropical conditions with no nearby tropical systems or fronts altering the pattern. This setup favors the 28°C outcome at 65.5% implied probability over 29°C, while cooler thresholds remain unlikely absent unexpected cloud cover or wind shifts. Updated model runs and official minimum readings will resolve the market.