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September weather forecast in Sihanoukville

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

	756 mmHg		84%
	6.2 m/s		+29

31 August, Sunday. day, 28°; night, 26°; rain

1 September, mon

	756 mmHg		84%
	6.4 m/s		+29

1 September, Monday. day, 28°; night, 26°; rain

2 September, tue

	756 mmHg		84%
	6.5 m/s		+29

2 September, Tuesday. day, 28°; night, 26°; rain

3 September, wed

	756 mmHg		84%
	6.2 m/s		+29

3 September, Wednesday. day, 28°; night, 26°; rain

4 September, thu

	756 mmHg		85%
	6.6 m/s		+29

4 September, Thursday. day, 27°; night, 26°; rain

5 September, fri

	756 mmHg		83%
	6.5 m/s		+29

5 September, Friday. day, 28°; night, 26°; rain

6 September, sat

	756 mmHg		83%
	6.5 m/s		+29

6 September, Saturday. day, 28°; night, 26°; rain

7 September, sun

	757 mmHg		84%
	6.3 m/s		+29

7 September, Sunday. day, 28°; night, 26°; rain

8 September, mon

	757 mmHg		84%
	5.8 m/s		+29

8 September, Monday. day, 28°; night, 26°; rain

9 September, tue

	756 mmHg		84%
	6.3 m/s		+29

9 September, Tuesday. day, 27°; night, 26°; rain

10 September, wed

	756 mmHg		85%
	6.4 m/s		+29

10 September, Wednesday. day, 27°; night, 26°; rain

11 September, thu

	756 mmHg		84%
	6.5 m/s		+29

11 September, Thursday. day, 27°; night, 26°; rain

12 September, fri

	757 mmHg		84%
	6.4 m/s		+29

12 September, Friday. day, 28°; night, 26°; rain

13 September, sat

	756 mmHg		84%
	6.7 m/s		+29

13 September, Saturday. day, 28°; night, 26°; rain

14 September, sun

	756 mmHg		85%
	7 m/s		+29

14 September, Sunday. day, 27°; night, 26°; rain

15 September, mon

	756 mmHg		86%
	7.1 m/s		+29

15 September, Monday. day, 27°; night, 26°; rain

16 September, tue

	756 mmHg		86%
	7.3 m/s		+29

16 September, Tuesday. day, 27°; night, 26°; rain

17 September, wed

	756 mmHg		85%
	6.7 m/s		+29

17 September, Wednesday. day, 27°; night, 26°; rain

18 September, thu

	757 mmHg		85%
	6.3 m/s		+29

18 September, Thursday. day, 27°; night, 26°; rain

19 September, fri

	757 mmHg		85%
	6.3 m/s		+29

19 September, Friday. day, 27°; night, 26°; rain

20 September, sat

	757 mmHg		84%
	6.3 m/s		+29

20 September, Saturday. day, 27°; night, 26°; rain

21 September, sun

	757 mmHg		84%
	5.7 m/s		+29

21 September, Sunday. day, 27°; night, 26°; rain

22 September, mon

	757 mmHg		85%
	5.7 m/s		+29

22 September, Monday. day, 27°; night, 26°; rain

23 September, tue

	757 mmHg		84%
	5.7 m/s		+29

23 September, Tuesday. day, 27°; night, 26°; rain

24 September, wed

	757 mmHg		85%
	5.5 m/s		+29

24 September, Wednesday. day, 27°; night, 26°; rain

25 September, thu

	757 mmHg		85%
	5.7 m/s		+29

25 September, Thursday. day, 27°; night, 26°; rain

26 September, fri

	757 mmHg		84%
	5.4 m/s		+29

26 September, Friday. day, 27°; night, 26°; partly cloudy

27 September, sat

	756 mmHg		85%
	6 m/s		+29

27 September, Saturday. day, 27°; night, 26°; rain

28 September, sun

	756 mmHg		84%
	5.7 m/s		+29

28 September, Sunday. day, 27°; night, 26°; rain

29 September, mon

	756 mmHg		84%
	5.6 m/s		+29

29 September, Monday. day, 28°; night, 26°; rain

30 September, tue

	757 mmHg		84%
	5.4 m/s		+29

30 September, Tuesday. day, 27°; night, 26°; rain

1 October, wed

	757 mmHg		84%
	5.3 m/s		+29

1 October, Wednesday. day, 27°; night, 26°; rain

2 October, thu

	757 mmHg		83%
	5 m/s		+29

2 October, Thursday. day, 27°; night, 26°; rain

3 October, fri

	757 mmHg		84%
	5 m/s		+29

3 October, Friday. day, 27°; night, 26°; rain

4 October, sat

	757 mmHg		83%
	4.9 m/s		+29

4 October, Saturday. day, 27°; night, 26°; rain

Average data for 10 years

Sihanoukville September

0

sunny days

29

days with precipitation

25

cloudy days

0 sunny days; 29 days with precipitation; 25 cloudy days;

84

%

air humidity

4.3

m/s

WindW

580

mm of precipitation

(17% of annual average)

+29

°C

Water temperature

air humidity 84%; 580 millimeters of precipitation (17% of annual average); Wind westerly 4.3 Meters per second; Water temperature +29°

Weather graphs for September

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

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

SW

W

SW

SW

W

SW

SW

SW

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

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Pattaya
Phú Quốc
Samui
Ho Chi Minh
Ko Chang
Phnom Penh
Siem Reap
Vũng Tàu
Côn Đảo

Cities with similar weather in September

Phuket
Santo Domingo
Varadero
Male
Phan Thiet
Samui
Krabi
Puerto Plata
Kinshasa

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

September in Sihanoukville is the coldest month of the year. In September, the weather in Sihanoukville is typically warm. Average daily high temperature in September is about 27 degrees above zero. On average, Sihanoukville has 29 rainy and 1 partly cloudy day in September. The rains are usually heavy. September as well as April, May, June, and July is considered the most uncomfortable time to visit Sihanoukville.

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