Hong Kong Weather and Climate in September

September in Hong Kong is the tail end of summer and the transition into early autumn. Daytime highs typically range from 29–31°C (84–88°F) in the early part of the month, gradually easing to 28–30°C (82–86°F) by late September. Nights remain warm and humid, often staying between 25–27°C (77–81°F). Rainfall is still high, averaging 250–300 mm over 12–15 days, with a continued risk of typhoons or tropical storms, though this risk slowly decreases as the month progresses.

This is a shoulder season with mixed advantages: warm weather suitable for beach and outdoor activities, gradually improving conditions toward the end of the month, and fewer crowds than July and August, along with better hotel rates.

City of Victoria

22.2800°N, 114.1700°E

Sunrise 14:00

Sunset 02:56

30°C

Overcast clouds

Feels Like 36°C

Humidity 74%

Wind 2.7 m/s

Pressure 1001 hPa

Visibility 10 km

Clouds 100%

2026-08-14 17:57 Data by OpenWeatherMap

Hong Kong Season in September: Early Autumn

September marks the gradual easing of Hong Kong’s hot, humid summer. Days remain warm and energetic, while occasional showers and possible typhoons bring variability. Precipitation is high but begins to taper off compared to the peak rainy months.

It is considered a decent transitional month for visiting Hong Kong — still summery but with signs of relief from extreme heat and humidity, plus a more relaxed travel pace.

Cooling but Still Warm Temperatures

September delivers lingering summer heat to Hong Kong. In the first half of the month, daytime highs often reach 30–31°C (86–88°F) with high humidity, making it feel quite warm during midday. Lows stay around 26–27°C (79–81°F).

In the second half, temperatures cool very slightly. Highs typically hover around 28–30°C (82–86°F), while lows fall to 25–26°C (77–79°F). The day-night difference is modest, but evenings can feel a bit more comfortable, especially after rain.

High Precipitation and Typhoon Risk

Hong Kong experiences significant rainfall in September, averaging 250–300 mm across roughly 12–15 days. Showers are often heavy and accompanied by thunderstorms. Although typhoon risk is lower than in August, tropical storms can still bring strong winds and heavy rain, particularly in the first half of the month.

Cloudy and overcast days are common, but sunny breaks offer good opportunities for harbor views and outdoor exploration.

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Tour Route：Hong Kong-Macau-Shenzhen-Guangzhou

Tour Type：City Tours

8 Days

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Daylight Hours and Sunshine

Daylight remains long, starting at around 12.5 hours early in the month and shortening to about 11.9 hours by late September. Sunshine hours average 5–6 per day due to frequent cloud cover. The UV index stays high on clearer days, so protection is necessary.

Averages for Hong Kong Weather in September

Temperature: 27°C / 81°F High Temperature: 30°C / 86°F Low Temperature: 26°C / 79°F Humidity: ~78–82% Rainfall: 250–300 mm Rainy Days: 12–15 days

A Recommended Visiting Month

September can be a good time to visit Hong Kong if you monitor weather forecasts closely. As summer crowds thin out, you can enjoy Victoria Peak, the Star Ferry, and Lantau Island with relatively more space. Hotel rates are often lower than in peak summer.

While rain and humidity are still factors, the warm weather supports beach visits, hiking, and vibrant city exploration. Conditions generally improve toward the end of the month.

Recommended Outfits for Visiting Hong Kong in September

Daytime: Light, breathable clothing such as short-sleeve shirts, polo shirts, shorts, light trousers, or dresses. Choose quick-drying fabrics due to high humidity and possible showers.

Evenings: Bring a thin long-sleeve shirt, light sweater, or jacket for air-conditioned malls, restaurants, or cooler evenings after rain.

Shoes: Comfortable walking shoes or sneakers with good grip — Hong Kong involves lots of walking, stairs, and potential wet surfaces.

Others: A compact umbrella or lightweight rain jacket (essential), high-SPF sunscreen and sunglasses, a reusable water bottle, and a small daypack. Quick-dry clothing is highly recommended.

Advice for Your Hong Kong Trip in September

September offers a lively yet slightly less crowded window to experience Hong Kong. Ride the Star Ferry, hike to Victoria Peak, explore Temple Street Night Market, or visit outlying islands. Keep an eye on typhoon warnings and have flexible plans.

Tips:

• Pack light, breathable layers and always carry a small umbrella or rain shell.
• Stay hydrated and take breaks in air-conditioned spaces during the warmest hours.
• Check weather and typhoon signals regularly via the Hong Kong Observatory.
• Enjoy seasonal dim sum, fresh seafood, and local street food.

Recommended Attractions: Victoria Peak, Victoria Harbour & Star Ferry, Lantau Island (Big Buddha & Ngong Ping), Temple Street Night Market, Mong Kok, Ocean Park, and day trips to nearby islands or Macau.

September delivers warm, humid weather with occasional heavy rain in Hong Kong. Pack appropriately for showers, stay flexible with your itinerary, and enjoy the city’s dynamic energy. Safe travels!