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Weather in Hong Kong for September 2025

Your guide to Hong Kong weather in September - trends and predictions
  • In general, the average temperature in Hong Kong at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.1 °C by the end of September.

  • Hong Kong experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.

  • Is September a good time to visit Hong Kong? check out the best time to travel to Hong Kong page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
5
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/26°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
82 %
Avg humidity

Hong Kong in September average weather

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Temperatures trend during September in Hong Kong

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
29° /25° 101.5 mm 7
2 Sept. Torrential rain shower
Torrential rain shower
30° /26° 81.9 mm 7
3 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
30° /26° 15.8 mm 7
4 Sept. Light rain shower
Light rain shower
31° /27° 3.3 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
30° /27° 5 mm 7
6 Sept. Light rain shower
Light rain shower
27° /25° 40 mm 6
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /26° 23 mm 6
8 Sept. Light rain shower
Light rain shower
27° /24° 26 mm 6
9 Sept. Light rain shower
Light rain shower
28° /25° 12.4 mm 6
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /25° 44.6 mm 6
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /26° 51.7 mm 6
12 Sept. Partly cloudy
Partly cloudy
29° /25° 0.2 mm 7
13 Sept. Partly cloudy
Partly cloudy
29° /26° 2 mm 7
14 Sept. Cloudy
Cloudy
29° /26° 5.8 mm 6
15 Sept. Cloudy
Cloudy
29° /25° 0.9 mm 6
16 Sept. Patchy light drizzle
Patchy light drizzle
29° /26° 2 mm 7
17 Sept. Patchy light drizzle
Patchy light drizzle
30° /26° 8.5 mm 7
18 Sept. Thundery outbreaks possible
Thundery outbreaks possible
29° /26° 2.2 mm 7
19 Sept. Patchy rain possible
Patchy rain possible
30° /26° 1.2 mm 7
20 Sept. Patchy rain possible
Patchy rain possible
30° /26° 2.1 mm 7
21 Sept. Patchy rain possible
Patchy rain possible
30° /25° 13.2 mm 7
22 Sept. Patchy rain possible
Patchy rain possible
29° /24° 5.3 mm 6
23 Sept. Partly cloudy
Partly cloudy
27° /23° 9.1 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
27° /24° 5.8 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
29° /25° 1.7 mm 6
26 Sept. Patchy rain possible
Patchy rain possible
29° /26° 0.5 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
30° /26° 2.4 mm 7
28 Sept. Patchy rain possible
Patchy rain possible
29° /27° 6.2 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
30° /26° 1.2 mm 7
30 Sept. Patchy rain possible
Patchy rain possible
30° /26° 1.6 mm 7
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Important Notice
Our weather forecast for Hong Kong in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hong Kong forecast closer to your planned date for the most up-to-date weather information.

Guide for Hong Kong in September

In September, Hong Kong experiences a transition from the hot and humid summer to the cooler and more comfortable autumn. At the beginning of the month, the weather in Hong Kong is still quite warm and humid, with temperatures averaging around 28° during the day and 25° at night.

The city also experiences occasional rain showers and thunderstorms, which contribute to the high humidity levels.

As the month progresses, the weather gradually becomes more pleasant, with slightly lower temperatures and less humidity. By the end of September, the average daytime temperature in Hong Kong drops to around 26°, while the nighttime temperatures decrease to about 23°.

The frequency of rain showers also decreases towards the end of the month, leading to clearer skies and more sunshine.

Overall, September is a transitional month for Hong Kong, with the weather shifting from the hot and rainy conditions of summer to the milder and drier weather of autumn.

Travelers visiting Hong Kong during this time can expect warm days, cooler nights, and a mix of sunny and rainy weather, making it important to pack accordingly for varying conditions.

Hong Kong in September - FAQ

Is September a good time to visit Hong Kong?
You can travel to Hong Kong in September, but there are probably better months doing so, read more about the best time to visit Hong Kong
What are the expected maximum and minimum temperatures in Hong Kong during September?
During September, expect a variety of temperatures with highs around 28° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hong Kong during September?
Significant rainfall exceeding 718.3 mm is expected in Hong Kong during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hong Kong during September?
The average wind speed in Hong Kong during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Hong Kong in September?

As you prepare for your trip to Hong Kong in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Hong Kong, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

September rainfall patterns in Hong Kong

Explore the daily rainfall trends and prepare for Hong Kongs September weather 💧

UV exposure in Hong Kong during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Hong Kong?

Get accurate weather forecasts for Hong Kong, located at latitude 22.278 and longitude 114.175. Stay updated with localized weather information tailored for Hong Kong.

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