September weather forecast
Hong Kong

September in Hong Kong marks the transition from the hot, humid summer to the more temperate autumn. The temperatures begin to decrease slightly, with average lows around 26°C (78.8°F) and average highs reaching approximately 30°C (86°F). The extreme heatwaves of the summer months become less common, making the city more comfortable to explore.

The variations in weather conditions across Hong Kong remain minor, but the outlying islands and hilly regions might experience slightly cooler temperatures than the downtown and urban areas, due to their geographical location and altitude.

September sees a substantial decrease in rainfall compared to August, with average precipitation around 250mm (9.84"). While the city is still technically in the typhoon season, the frequency of storms begins to lessen, and the weather gradually becomes less humid.

As the city transitions into October, the weather continues to cool, with temperatures dropping to an average of 22°C (71.6°F) to 28°C (82.4°F), and rainfall further decreases to 100mm (3.94"). Despite the decreased rainfall and slightly cooler temperatures, September is still a warm month in Hong Kong. Visitors are advised to dress in light, breathable clothing and be prepared for the occasional rain shower.

---

• Tai Po - September »
  September in Tai Po, Hong Kong witnesses the initial signs of seasonal change, with a gentle decline in temperature and a slight drop in rainfall levels. As September unfolds, the intense heat of August gives way to somewhat milder days, although humidity levels remain high.
• Hong Kong - September »
  On the last day of September, in Hong Kong, sunrise is at 06:14 and sunset at 18:12 HKT. In Hong Kong, in September, during 14.7 rainfall days, 328mm (12.91") of precipitation is typically accumulated.
• Tin Shui Wai - September »
  September nights in Tin Shui Wai register a minor temperature decline, steadying at a warm 26.4°C (79.5°F). The months with the highest UV index in Tin Shui Wai are May through September, with an average maximum UV index of 7.
• Kowloon - September »
  On the first day of September in Kowloon, sunrise is at 06:06 and sunset at 18:40. In Kowloon, in September, the average water temperature is 28.3°C (82.9°F).