Click on a day for an hourly weather forecast
The temperatures in Hong Kong during September are extremely high, between 27°C and hot as 32°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Hong Kong. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Hong Kong in September 2025.
If you’re planning to visit Hong Kong in the near future, we highly recommend that you review the 14 day weather forecast for Hong Kong before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 15° | 5 | 27 | 0 | 48 mm | Good | Hong Kong in January |
| February | 21° / 16° | 5 | 23 | 0 | 68 mm | Good | Hong Kong in February |
| March | 23° / 19° | 7 | 24 | 0 | 87 mm | Good | Hong Kong in March |
| April | 26° / 21° | 8 | 22 | 0 | 177 mm | Good | Hong Kong in April |
| May | 29° / 25° | 13 | 18 | 0 | 357 mm | Ok | Hong Kong in May |
| June | 31° / 27° | 17 | 13 | 0 | 494 mm | Ok | Hong Kong in June |
| July | 32° / 27° | 17 | 14 | 0 | 419 mm | Ok | Hong Kong in July |
| August | 32° / 28° | 18 | 13 | 0 | 527 mm | Ok | Hong Kong in August |
| September | 32° / 27° | 12 | 18 | 0 | 356 mm | Ok | Hong Kong in September |
| October | 29° / 24° | 5 | 26 | 0 | 138 mm | Good | Hong Kong in October |
| November | 25° / 20° | 4 | 26 | 0 | 64 mm | Perfect | Hong Kong in November |
| December | 21° / 16° | 3 | 28 | 0 | 43 mm | Good | Hong Kong in December |