Weather in Hong Kong for September 2027
In general, the average temperature in Hong Kong at the beginning of September is 29.7 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.5 °C by the end of September.
Hong Kong in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 265 mm.
Is September a good time to visit Hong Kong? check out the best time to travel to Hong Kong page.
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Hong Kong Weather September
What’s the Weather Like in Hong Kong This September?
Temperatures trend during September in Hong Kong
September weather in Hong Kong day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Heavy rain | 30° /26° | 40 mm | 6 | |
| 2 Sept. |  Heavy rain at times | 30° /26° | 29.6 mm | 6 | |
| 3 Sept. |  Moderate or heavy rain shower | 30° /26° | 6.1 mm | 6 | |
| 4 Sept. |  Patchy rain possible | 30° /27° | 2 mm | 7 | |
| 5 Sept. |  Light rain | 30° /27° | 3.3 mm | 7 | |
| 6 Sept. |  Moderate rain | 29° /26° | 14.7 mm | 7 | |
| 7 Sept. | Moderate rain | 29° /26° | 15.2 mm | 7 | |
| 8 Sept. | Moderate rain | 28° /26° | 21.7 mm | 7 | |
| 9 Sept. | Moderate rain | 29° /26° | 11.9 mm | 6 | |
| 10 Sept. | Moderate rain | 29° /26° | 17.3 mm | 6 | |
| 11 Sept. | Moderate rain | 29° /26° | 17.6 mm | 7 | |
| 12 Sept. | Patchy rain possible | 30° /26° | 1.1 mm | 7 | |
| 13 Sept. | Light rain | 30° /26° | 3.7 mm | 7 | |
| 14 Sept. | Light rain | 30° /27° | 4.1 mm | 6 | |
| 15 Sept. | Light rain | 30° /26° | 3.5 mm | 7 | |
| 16 Sept. | Light rain | 30° /26° | 5.3 mm | 7 | |
| 17 Sept. | Light rain | 30° /26° | 4.2 mm | 7 | |
| 18 Sept. | Light rain | 30° /27° | 3 mm | 8 | |
| 19 Sept. | Light rain | 30° /26° | 2.7 mm | 7 | |
| 20 Sept. | Light rain | 30° /27° | 2.9 mm | 7 | |
| 21 Sept. | Moderate rain | 30° /26° | 10 mm | 7 | |
| 22 Sept. | Light rain | 30° /25° | 4.4 mm | 7 | |
| 23 Sept. | Light rain | 29° /25° | 4.9 mm | 7 | |
| 24 Sept. | Moderate rain | 28° /25° | 23.8 mm | 7 | |
| 25 Sept. | Light rain | 29° /26° | 2.9 mm | 7 | |
| 26 Sept. | Patchy rain possible | 29° /26° | 0.6 mm | 7 | |
| 27 Sept. | Patchy rain possible | 30° /26° | 1.1 mm | 7 | |
| 28 Sept. | Light rain | 30° /27° | 3 mm | 6 | |
| 29 Sept. | Patchy rain possible | 30° /26° | 2.2 mm | 7 | |
| 30 Sept. | Patchy rain possible | 30° /26° | 2.1 mm | 7 | |
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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.