What to expect in Hong Kong in September
September is a mixed month in Hong Kong. You get 31° / 26°, but manageable crowds at the big attractions. Worth it for the right traveller.
Hong Kong weather in September
Typical conditions in Hong Kong during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 31°C 88°F |
|---|---|
| Average low | 26°C 79°F |
| Rainfall | Wet 100/100 |
| Total rainfall | 321 mm12.7 in |
| Rainy days | 15 |
| Sea temperature | 28°C 83°F |
| Daylight | 12 h 17 min |
| How it feels | Hot — midday shade matters |
Average highs sit around 31°C with lows near 26°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Moderate for Hong Kong — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Lightweight, breathable clothes, strong sun protection and a refillable bottle — highs near 31°C make midday heat the main constraint. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
Costs in September sit around the yearly average for Hong Kong — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 38% less.
Tours worth booking in Hong Kong
Who this month suits
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
- Visitors who want to catch a festival
Events & what’s on
Look out for Mid-Autumn Festival while you’re there.
- Mid-Autumn Festival — Lanterns light up Victoria Park and the Tsim Sha Tsui waterfront around the September full moon.
Hong Kong in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 32° / 27° | Moderate | $$ | 45 |
| August | 31° / 27° | Moderate | $$ | 44 |
| September · This month | 31° / 26° | Moderate | $$ | 51 |
| October | 28° / 24° | High | $$ | 49 |
| November | 25° / 20° | High | $$ | 55 |
These months score higher for Hong Kong on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated November 2026
