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September weather forecast in Haikou

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

	754 mmHg		82%
	4.69 m/s		+30

31 August, Sunday. day, 31°; night, 27°; rain

1 September, mon

	754 mmHg		82%
	4.8 m/s		+30

1 September, Monday. day, 30°; night, 27°; rain

2 September, tue

	754 mmHg		82%
	4.8 m/s		+30

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

3 September, wed

	754 mmHg		81%
	4.5 m/s		+30

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

4 September, thu

	754 mmHg		81%
	4.5 m/s		+30

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

5 September, fri

	754 mmHg		81%
	4.5 m/s		+30

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

6 September, sat

	754 mmHg		81%
	4.9 m/s		+30

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

7 September, sun

	755 mmHg		83%
	5.1 m/s		+30

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

8 September, mon

	755 mmHg		83%
	5.3 m/s		+30

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

9 September, tue

	755 mmHg		83%
	5.5 m/s		+30

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

10 September, wed

	755 mmHg		83%
	5 m/s		+30

10 September, Wednesday. day, 29°; night, 26°; rain

11 September, thu

	755 mmHg		82%
	5 m/s		+30

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

12 September, fri

	755 mmHg		81%
	4.8 m/s		+29

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

13 September, sat

	755 mmHg		82%
	5.1 m/s		+29

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

14 September, sun

	755 mmHg		82%
	5.5 m/s		+29

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

15 September, mon

	754 mmHg		82%
	5.1 m/s		+29

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

16 September, tue

	754 mmHg		82%
	5 m/s		+29

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

17 September, wed

	755 mmHg		82%
	5.4 m/s		+29

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

18 September, thu

	756 mmHg		81%
	6 m/s		+29

18 September, Thursday. day, 30°; night, 26°; partly cloudy

19 September, fri

	756 mmHg		81%
	5.8 m/s		+29

19 September, Friday. day, 29°; night, 26°; partly cloudy

20 September, sat

	756 mmHg		81%
	5.2 m/s		+29

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

21 September, sun

	756 mmHg		80%
	5 m/s		+29

21 September, Sunday. day, 30°; night, 26°; clear

22 September, mon

	756 mmHg		79%
	5.5 m/s		+29

22 September, Monday. day, 29°; night, 26°; partly cloudy

23 September, tue

	756 mmHg		80%
	5.8 m/s		+29

23 September, Tuesday. day, 29°; night, 25°; rain

24 September, wed

	756 mmHg		81%
	6.3 m/s		+29

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

25 September, thu

	756 mmHg		82%
	6.6 m/s		+29

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

26 September, fri

	757 mmHg		81%
	6.3 m/s		+29

26 September, Friday. day, 29°; night, 25°; clear

27 September, sat

	757 mmHg		81%
	5.7 m/s		+29

27 September, Saturday. day, 29°; night, 25°; clear

28 September, sun

	756 mmHg		80%
	5.6 m/s		+28

28 September, Sunday. day, 29°; night, 25°; clear

29 September, mon

	756 mmHg		80%
	5.8 m/s		+28

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

30 September, tue

	757 mmHg		80%
	5.3 m/s		+28

30 September, Tuesday. day, 29°; night, 25°; clear

1 October, wed

	757 mmHg		80%
	5.8 m/s		+28

1 October, Wednesday. day, 29°; night, 25°; rain

2 October, thu

	757 mmHg		79%
	6 m/s		+28

2 October, Thursday. day, 29°; night, 25°; rain

3 October, fri

	757 mmHg		79%
	6.5 m/s		+28

3 October, Friday. day, 29°; night, 25°; rain

4 October, sat

	757 mmHg		80%
	6.4 m/s		+28

4 October, Saturday. day, 29°; night, 25°; rain

Average data for 10 years

Haikou September

6

sunny days

20

days with precipitation

12

cloudy days

6 sunny days; 20 days with precipitation; 12 cloudy days;

81

%

air humidity

3.7

m/s

WindSE

197

mm of precipitation

(17% of annual average)

+29

°C

Water temperature

air humidity 81%; 197 millimeters of precipitation (17% of annual average); Wind south-easterly 3.7 Meters per second; Water temperature +29°

Weather graphs for September

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

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S

S

S

S

S

S

SE

SE

SE

SE

SE

SE

SE

S

SE

SE

SE

SE

SE

SE

SE

SE

SE

E

E

E

SE

SE

E

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

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29

30

Daytime temperature

Night-time temperature

Cities near you

Sanya
Dadonghai
Yalong Bay
Ha Long
Macau
Boao
Haiphong
Lingshui
Zhanjiang

Cities with similar weather in September

Nha Trang
Hurgada
Bangkok
Miami
Havana
Cancun
Hong Kong
Miami Beach
Manila

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

In September, the weather in Haikou is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, Haikou has 20 rainy, 6 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 Haikou.

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