Hong Kong Observatory forecasts point to a higher chance of near-normal or above-normal August rainfall, aligning with trader emphasis on the 450–475 mm and 550–600 mm brackets. Primary drivers include the active southwest monsoon trough, which fuels widespread showers and thunderstorms, plus potential tropical cyclone passages that can deliver intense localized downpours. Model consensus on cyclone tracks, steering patterns, and landfall timing remains the key uncertainty, as even modest shifts in storm frequency or proximity can swing totals by 50–100 mm. With roughly half the month elapsed amid recent heavy rain episodes, traders weigh these variables against climatological baselines around 450 mm while awaiting updated HKO guidance and ensemble runs.