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Hong Kong weather

Weather in Hong Kong for September 2025

Your guide to Hong Kong weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Hong Kong at the beginning of September is 30.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 30.3 °C by the end of September.

    • Rain 🌧️

  • Hong Kong experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 288.3 mm.

Average dry days
2
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/26°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Hong Kong in September average weather

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate or heavy rain shower
30°
2
Heavy rain at times
31°
3
Moderate or heavy rain shower
31°
4
Heavy rain at times
31°
5
Moderate or heavy rain shower
31°
6
Moderate or heavy rain shower
30°
7
Moderate or heavy rain shower
29°
8
Light rain shower
29°
9
Light rain shower
30°
10
Moderate or heavy rain shower
29°
11
Patchy rain possible
30°
12
Overcast
31°
13
Patchy rain possible
31°
14
Cloudy
31°
15
Moderate or heavy rain shower
31°
16
Moderate or heavy rain shower
31°
17
Moderate or heavy rain shower
31°
18
Moderate rain at times
30°
19
Moderate or heavy rain shower
30°
20
Moderate or heavy rain shower
30°
21
Moderate or heavy rain shower
30°
22
Moderate or heavy rain shower
30°
23
Moderate or heavy rain shower
28°
24
Patchy rain possible
29°
25
Patchy rain possible
30°
26
Cloudy
30°
27
Patchy rain possible
31°
28
Patchy rain possible
30°
29
Patchy rain possible
31°
30
Patchy rain possible
31°
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Temperatures trend during September in Hong Kong

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /26° 56.5 mm 7
2 Sept. Heavy rain at times
Heavy rain at times
 31° /26° 41.7 mm 7
3 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /26° 8.9 mm 7
4 Sept. Heavy rain at times
Heavy rain at times
 31° /27° 2.9 mm 7
5 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /27° 4.2 mm 7
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /25° 21.6 mm 7
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /26° 16.3 mm 6
8 Sept. Light rain shower
Light rain shower
 29° /25° 17.4 mm 6
9 Sept. Light rain shower
Light rain shower
 30° /26° 6.5 mm 7
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /25° 24.1 mm 7
11 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 26.1 mm 7
12 Sept. Overcast
Overcast
 31° /26° 0.1 mm 7
13 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 1.2 mm 7
14 Sept. Cloudy
Cloudy
 31° /27° 4.5 mm 7
15 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /25° 1.7 mm 7
16 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /26° 3.9 mm 7
17 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /26° 6.1 mm 7
18 Sept. Moderate rain at times
Moderate rain at times
 30° /26° 2.4 mm 7
19 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /26° 3.8 mm 7
20 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /26° 3.5 mm 7
21 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /26° 8.7 mm 7
22 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /25° 4.8 mm 7
23 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /24° 6.3 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 4.2 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 0.9 mm 7
26 Sept. Cloudy
Cloudy
 30° /26° 0.3 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 1.5 mm 7
28 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 3.1 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 2.5 mm 7
30 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 2.9 mm 7
Next
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.

Have you visited Hong Kong in September? Share your experience by writing a review.

Hong Kong in September - FAQ

What are the expected maximum and minimum temperatures in Hong Kong during September?
During September, expect a variety of temperatures with highs around 30° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hong Kong during September?
Significant rainfall exceeding 288.3 mm is expected in Hong Kong during September, occurring over more than 28 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 19 km/h, suggesting breezy to windy conditions, depending on your activities.

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 ☀️
Regions in Hong Kong
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Central and WesternIslandsKowloon CitySai KungSha TinTai PoTsuen WanTuen MunYuen Long
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Hong KongKowloonKwai ChungSha TinSha Tin WaiTai PoTin Shui WaiTseung Kwan OTuen MunTung ChungVictoria
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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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