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September weather forecast in Ha Long

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

	752 mmHg		84%
	3.3 m/s		+30

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

1 September, mon

	752 mmHg		84%
	3 m/s		+30

1 September, Monday. day, 31°; night, 25°; rain

2 September, tue

	752 mmHg		84%
	3.3 m/s		+30

2 September, Tuesday. day, 31°; night, 25°; rain

3 September, wed

	752 mmHg		85%
	3.4 m/s		+30

3 September, Wednesday. day, 30°; night, 25°; rain

4 September, thu

	752 mmHg		85%
	3.2 m/s		+30

4 September, Thursday. day, 30°; night, 25°; rain

5 September, fri

	752 mmHg		84%
	3.3 m/s		+30

5 September, Friday. day, 30°; night, 25°; rain

6 September, sat

	752 mmHg		84%
	3.4 m/s		+30

6 September, Saturday. day, 31°; night, 26°; rain

7 September, sun

	752 mmHg		85%
	3.8 m/s		+30

7 September, Sunday. day, 30°; night, 25°; rain

8 September, mon

	753 mmHg		86%
	3.8 m/s		+30

8 September, Monday. day, 30°; night, 25°; rain

9 September, tue

	753 mmHg		85%
	3.7 m/s		+30

9 September, Tuesday. day, 30°; night, 25°; rain

10 September, wed

	753 mmHg		85%
	3.7 m/s		+30

10 September, Wednesday. day, 29°; night, 25°; rain

11 September, thu

	753 mmHg		85%
	3.9 m/s		+30

11 September, Thursday. day, 29°; night, 25°; rain

12 September, fri

	753 mmHg		85%
	3.6 m/s		+30

12 September, Friday. day, 30°; night, 25°; rain

13 September, sat

	753 mmHg		83%
	3.8 m/s		+30

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

14 September, sun

	753 mmHg		83%
	3.7 m/s		+29

14 September, Sunday. day, 30°; night, 25°; rain

15 September, mon

	753 mmHg		82%
	3.4 m/s		+29

15 September, Monday. day, 30°; night, 25°; rain

16 September, tue

	753 mmHg		82%
	3.5 m/s		+29

16 September, Tuesday. day, 30°; night, 25°; rain

17 September, wed

	753 mmHg		82%
	3.9 m/s		+30

17 September, Wednesday. day, 30°; night, 25°; rain

18 September, thu

	754 mmHg		82%
	4.1 m/s		+30

18 September, Thursday. day, 30°; night, 25°; rain

19 September, fri

	754 mmHg		82%
	4 m/s		+30

19 September, Friday. day, 30°; night, 25°; rain

20 September, sat

	754 mmHg		81%
	3.9 m/s		+30

20 September, Saturday. day, 30°; night, 24°; partly cloudy

21 September, sun

	754 mmHg		80%
	3.8 m/s		+29

21 September, Sunday. day, 30°; night, 24°; clear

22 September, mon

	754 mmHg		79%
	3.8 m/s		+29

22 September, Monday. day, 30°; night, 24°; clear

23 September, tue

	754 mmHg		79%
	3.8 m/s		+29

23 September, Tuesday. day, 30°; night, 24°; partly cloudy

24 September, wed

	754 mmHg		81%
	4 m/s		+29

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

25 September, thu

	754 mmHg		82%
	4.5 m/s		+29

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

26 September, fri

	755 mmHg		83%
	4.4 m/s		+29

26 September, Friday. day, 29°; night, 24°; rain

27 September, sat

	755 mmHg		82%
	4.19 m/s		+29

27 September, Saturday. day, 29°; night, 24°; rain

28 September, sun

	755 mmHg		79%
	4 m/s		+29

28 September, Sunday. day, 30°; night, 24°; clear

29 September, mon

	754 mmHg		79%
	4 m/s		+29

29 September, Monday. day, 30°; night, 24°; clear

30 September, tue

	755 mmHg		79%
	3.9 m/s		+29

30 September, Tuesday. day, 30°; night, 24°; clear

1 October, wed

	756 mmHg		79%
	4 m/s		+29

1 October, Wednesday. day, 30°; night, 24°; rain

2 October, thu

	756 mmHg		78%
	4 m/s		+29

2 October, Thursday. day, 30°; night, 24°; clear

3 October, fri

	756 mmHg		78%
	4.19 m/s		+29

3 October, Friday. day, 30°; night, 24°; rain

4 October, sat

	756 mmHg		79%
	4.3 m/s		+29

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

Average data for 10 years

Ha Long September

5

sunny days

21

days with precipitation

13

cloudy days

5 sunny days; 21 days with precipitation; 13 cloudy days;

82

%

air humidity

2.5

m/s

WindSE

264

mm of precipitation

(15% of annual average)

+30

°C

Water temperature

air humidity 82%; 264 millimeters of precipitation (15% of annual average); Wind south-easterly 2.5 Meters per second; Water temperature +30°

Weather graphs for September

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

S

S

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

E

E

SE

SE

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

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26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Sanya
Hanoi
Dadonghai
Yalong Bay
Haikou
Ninh Bình
Boao
Haiphong
Lingshui

Cities with similar weather in September

Nha Trang
Sanya
Hurgada
Bangkok
Varadero
Havana
Cancun
Hong Kong
Boca Chica

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

In September, the weather in Ha Long is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, Ha Long has 21 rainy, 5 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 Ha Long.

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