🏙️ Hong Kong Weather

Monsoon heat and typhoon signals

Hong Kong has a humid subtropical climate that edges toward the tropical, governed by the Asian monsoon. The year divides into a hot, wet, stormy summer and a mild, dry, pleasant winter — with the ever-present possibility of a typhoon dictating life in the warm months, when the city's famous storm-warning signals go up.

Hot, wet, typhoon-prone summers

From May through September, the southwest monsoon brings hot, intensely humid weather and frequent heavy rain, with summer highs around 88°F (31°C) and a heat index much higher. This is also typhoon season: when a major storm approaches, the Hong Kong Observatory raises numbered signals, and a "T8" or higher shuts down the entire city — schools, offices, and transit alike.

Mild, dry winters

Winters are mild and comparatively dry, with January highs around 64°F (18°C), low humidity, and pleasant sunshine — the most comfortable season of the year. Genuine cold is rare, though occasional surges of northern air can bring a damp, surprisingly raw chill to the subtropical city.

Hong Kong is very wet, averaging about 94 inches (2,400 mm) of rain a year, the vast majority in the summer monsoon. Spring is warm, humid, and foggy, while autumn brings the clearest, most settled weather — the local favorite.

Monsoon rhythm and typhoon signals

Hong Kong's humid subtropical climate is governed by the monsoon: hot, oppressively humid summers with heavy rain from May to September, and mild, dry, pleasant winters when the northeast monsoon brings cooler, clearer air — the most comfortable time to visit.

Typhoons are the dramatic threat, and the city's warning-signal system — from T1 up to the city-halting T8 and T10 — is woven into daily life from summer into autumn. The steep terrain squeezes out intense downpours and landslide risk, while spring can bring dense fog and drizzle rolling in off the warm South China Sea.