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September weather forecast in Hong Kong

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	750 mmHg		83%
	3.9 m/s		+29

31 August, Sunday. day, 31°; night, 26°; rain

1 September, mon

	751 mmHg		84%
	4.19 m/s		+29

1 September, Monday. day, 30°; night, 26°; rain

2 September, tue

	751 mmHg		85%
	4.1 m/s		+29

2 September, Tuesday. day, 30°; night, 26°; rain

3 September, wed

	751 mmHg		84%
	3.7 m/s		+29

3 September, Wednesday. day, 30°; night, 26°; rain

4 September, thu

	751 mmHg		83%
	3.6 m/s		+29

4 September, Thursday. day, 30°; night, 26°; rain

5 September, fri

	751 mmHg		82%
	3.8 m/s		+29

5 September, Friday. day, 30°; night, 26°; rain

6 September, sat

	751 mmHg		82%
	3.7 m/s		+29

6 September, Saturday. day, 30°; night, 26°; rain

7 September, sun

	752 mmHg		83%
	4 m/s		+29

7 September, Sunday. day, 30°; night, 26°; rain

8 September, mon

	752 mmHg		82%
	3.9 m/s		+29

8 September, Monday. day, 30°; night, 26°; rain

9 September, tue

	752 mmHg		82%
	3.7 m/s		+29

9 September, Tuesday. day, 30°; night, 26°; rain

10 September, wed

	752 mmHg		80%
	3.7 m/s		+29

10 September, Wednesday. day, 30°; night, 26°; rain

11 September, thu

	752 mmHg		80%
	4 m/s		+29

11 September, Thursday. day, 30°; night, 26°; rain

12 September, fri

	752 mmHg		80%
	4.1 m/s		+29

12 September, Friday. day, 30°; night, 26°; rain

13 September, sat

	752 mmHg		80%
	4.1 m/s		+29

13 September, Saturday. day, 30°; night, 26°; rain

14 September, sun

	751 mmHg		80%
	4.19 m/s		+29

14 September, Sunday. day, 30°; night, 26°; rain

15 September, mon

	751 mmHg		79%
	4.6 m/s		+29

15 September, Monday. day, 30°; night, 26°; rain

16 September, tue

	751 mmHg		79%
	4.69 m/s		+29

16 September, Tuesday. day, 30°; night, 26°; rain

17 September, wed

	753 mmHg		79%
	4.19 m/s		+29

17 September, Wednesday. day, 30°; night, 26°; clear

18 September, thu

	753 mmHg		78%
	4.1 m/s		+29

18 September, Thursday. day, 30°; night, 26°; clear

19 September, fri

	753 mmHg		79%
	3.9 m/s		+29

19 September, Friday. day, 31°; night, 26°; rain

20 September, sat

	753 mmHg		78%
	4 m/s		+29

20 September, Saturday. day, 30°; night, 25°; rain

21 September, sun

	753 mmHg		77%
	4.19 m/s		+29

21 September, Sunday. day, 29°; night, 25°; partly cloudy

22 September, mon

	753 mmHg		77%
	4.6 m/s		+29

22 September, Monday. day, 29°; night, 25°; partly cloudy

23 September, tue

	753 mmHg		78%
	4.69 m/s		+28

23 September, Tuesday. day, 29°; night, 25°; partly cloudy

24 September, wed

	754 mmHg		79%
	4.6 m/s		+28

24 September, Wednesday. day, 29°; night, 25°; partly cloudy

25 September, thu

	754 mmHg		79%
	4.1 m/s		+28

25 September, Thursday. day, 29°; night, 25°; clear

26 September, fri

	754 mmHg		78%
	3.9 m/s		+28

26 September, Friday. day, 30°; night, 25°; clear

27 September, sat

	753 mmHg		76%
	4.19 m/s		+28

27 September, Saturday. day, 30°; night, 25°; clear

28 September, sun

	753 mmHg		76%
	4.6 m/s		+28

28 September, Sunday. day, 30°; night, 25°; clear

29 September, mon

	753 mmHg		77%
	4.3 m/s		+29

29 September, Monday. day, 29°; night, 25°; clear

30 September, tue

	754 mmHg		77%
	4.19 m/s		+28

30 September, Tuesday. day, 30°; night, 25°; clear

1 October, wed

	754 mmHg		78%
	4.19 m/s		+28

1 October, Wednesday. day, 30°; night, 25°; rain

2 October, thu

	754 mmHg		75%
	4.6 m/s		+28

2 October, Thursday. day, 30°; night, 25°; rain

3 October, fri

	755 mmHg		76%
	4.69 m/s		+28

3 October, Friday. day, 29°; night, 24°; rain

4 October, sat

	755 mmHg		76%
	4.4 m/s		+28

4 October, Saturday. day, 29°; night, 24°; rain

Average data for 10 years

Hong Kong September

8

sunny days

18

days with precipitation

9

cloudy days

8 sunny days; 18 days with precipitation; 9 cloudy days;

80

%

air humidity

2.8

m/s

WindSE

209

mm of precipitation

(12% of annual average)

+29

°C

Water temperature

air humidity 80%; 209 millimeters of precipitation (12% of annual average); Wind south-easterly 2.8 Meters per second; Water temperature +29°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

S

S

S

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

E

E

E

E

E

SE

SE

SE

SE

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

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26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Guangzhou
Shenzhen
Macau
Zhuhai
Zhanjiang
Dongguan
Foshan
Anbu
Huizhou

Cities with similar weather in September

Pattaya
Nha Trang
Sharm-El-Sheikh
Sanya
Hurgada
Bangkok
Miami
Punta Cana
Cancun

The weather forecast for September 2025 is based on historical data from the past 10 years.

In September, the weather in Hong Kong is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, Hong Kong has 18 rainy, 8 sunny, and 4 partly cloudy days in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Hong Kong.

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