September · China
Best time to visit Hong Kong in September Weather, crowds & prices
Weather in Hong Kong in September
Average temperature 28°C, 281 mm of rain, about 19 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
2.9/10
Ranked #10 of 12 months
- Avg temp
- 28°C
- Rainfall
- 281 mm
- Humidity
- 81%
- Days with 6h+ sun
- 19
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Hong Kong scores 2.9/10 for sightseeing and cultural travel - ranked #10 of 12. Expect around 28°C, 281 mm of rain, and roughly 19 days with 6+ hours of sunshine this month.
Harbor skyline, dim sum, and hillside trails feel best in the cooler dry stretch of January-March.
September in Hong Kong — off-season conditions
September averages 28°C (83°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
281 mm of rain puts this in monsoon territory — about 19 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 2.9/10 here, 10th of 12 months, against 8.7/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Figure on low-season pricing, with crowds are light for this destination.
Flexible dates? December scores 5.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Hong Kong in September?
- In September, Hong Kong averages 28°C, 281 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 2.9/10.
- Is September a good time to visit Hong Kong?
- September earns a 2.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Hong Kong in September?
- Expect about 281 mm of rain in September. Average humidity is 81% and there are about 19 days with 6+ hours of sunshine.
Curated in Hong Kong
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Things to do in Hong Kong
Hong Kong, China. Live activities and tours from GetYourGuide, matched to this destination.