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September weather forecast in Saint-Louis

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

	759 mmHg		83%
	6.7 m/s		+29

31 August, Sunday. day, 27°; night, 27°; partly cloudy

1 September, mon

	759 mmHg		83%
	6.4 m/s		+29

1 September, Monday. day, 27°; night, 27°; partly cloudy

2 September, tue

	759 mmHg		83%
	6.6 m/s		+29

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

3 September, wed

	759 mmHg		83%
	6.5 m/s		+29

3 September, Wednesday. day, 27°; night, 27°; partly cloudy

4 September, thu

	759 mmHg		84%
	6.8 m/s		+29

4 September, Thursday. day, 28°; night, 27°; rain

5 September, fri

	759 mmHg		83%
	6.7 m/s		+29

5 September, Friday. day, 28°; night, 27°; rain

6 September, sat

	758 mmHg		83%
	6.9 m/s		+29

6 September, Saturday. day, 28°; night, 27°; overcast

7 September, sun

	758 mmHg		84%
	6.7 m/s		+29

7 September, Sunday. day, 28°; night, 27°; overcast

8 September, mon

	759 mmHg		83%
	6.7 m/s		+29

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

9 September, tue

	759 mmHg		83%
	6.7 m/s		+29

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

10 September, wed

	759 mmHg		83%
	6.7 m/s		+29

10 September, Wednesday. day, 28°; night, 27°; overcast

11 September, thu

	759 mmHg		83%
	6.4 m/s		+29

11 September, Thursday. day, 28°; night, 27°; clear

12 September, fri

	759 mmHg		82%
	6.6 m/s		+29

12 September, Friday. day, 28°; night, 27°; rain

13 September, sat

	759 mmHg		82%
	6.7 m/s		+29

13 September, Saturday. day, 28°; night, 27°; clear

14 September, sun

	759 mmHg		82%
	6.5 m/s		+29

14 September, Sunday. day, 28°; night, 27°; clear

15 September, mon

	759 mmHg		83%
	6.6 m/s		+29

15 September, Monday. day, 28°; night, 27°; clear

16 September, tue

	759 mmHg		82%
	6.5 m/s		+29

16 September, Tuesday. day, 28°; night, 27°; partly cloudy

17 September, wed

	759 mmHg		82%
	6.4 m/s		+29

17 September, Wednesday. day, 28°; night, 27°; partly cloudy

18 September, thu

	759 mmHg		82%
	6.2 m/s		+29

18 September, Thursday. day, 28°; night, 27°; partly cloudy

19 September, fri

	759 mmHg		83%
	6.2 m/s		+29

19 September, Friday. day, 28°; night, 27°; partly cloudy

20 September, sat

	759 mmHg		82%
	6.4 m/s		+29

20 September, Saturday. day, 28°; night, 27°; partly cloudy

21 September, sun

	759 mmHg		81%
	6.6 m/s		+29

21 September, Sunday. day, 28°; night, 27°; clear

22 September, mon

	759 mmHg		83%
	6.7 m/s		+29

22 September, Monday. day, 28°; night, 27°; partly cloudy

23 September, tue

	759 mmHg		83%
	6.7 m/s		+29

23 September, Tuesday. day, 28°; night, 27°; clear

24 September, wed

	759 mmHg		81%
	6.7 m/s		+29

24 September, Wednesday. day, 28°; night, 27°; clear

25 September, thu

	759 mmHg		81%
	6.7 m/s		+29

25 September, Thursday. day, 28°; night, 27°; clear

26 September, fri

	759 mmHg		82%
	6.4 m/s		+29

26 September, Friday. day, 28°; night, 27°; clear

27 September, sat

	759 mmHg		82%
	6.5 m/s		+29

27 September, Saturday. day, 28°; night, 27°; clear

28 September, sun

	759 mmHg		82%
	6.4 m/s		+29

28 September, Sunday. day, 28°; night, 27°; clear

29 September, mon

	759 mmHg		82%
	6.7 m/s		+29

29 September, Monday. day, 28°; night, 27°; clear

30 September, tue

	759 mmHg		81%
	6.6 m/s		+29

30 September, Tuesday. day, 28°; night, 27°; clear

1 October, wed

	759 mmHg		81%
	7 m/s		+29

1 October, Wednesday. day, 28°; night, 27°; clear

2 October, thu

	758 mmHg		80%
	7 m/s		+29

2 October, Thursday. day, 28°; night, 27°; clear

3 October, fri

	758 mmHg		81%
	7.1 m/s		+29

3 October, Friday. day, 28°; night, 27°; clear

4 October, sat

	759 mmHg		81%
	7 m/s		+29

4 October, Saturday. day, 28°; night, 27°; clear

Average data for 10 years

Saint-Louis September

13

sunny days

6

days with precipitation

6

cloudy days

13 sunny days; 6 days with precipitation; 6 cloudy days;

82

%

air humidity

4.8

m/s

WindW

41

mm of precipitation

(36% of annual average)

+29

°C

Water temperature

air humidity 82%; 41 millimeters of precipitation (36% of annual average); Wind westerly 4.8 Meters per second; Water temperature +29°

Weather graphs for September

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

W

W

W

W

W

W

SW

SW

W

W

W

SW

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

W

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

Praia
Conakry
Banjul
Nouakchott
Dakar
Santa Maria
Kaolack
Thies
Nouadhibou

Cities with similar weather in September

Pattaya
Nha Trang
Bangkok
Santo Domingo
Varadero
Punta Cana
Havana
Ko Chang
Mumbai

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

September in Saint-Louis is the warmest month of the year. In September, the weather in Saint-Louis is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Saint-Louis has 13 sunny, 8 partly cloudy, 6 rainy, and 3 cloudy days in September. The rains are usually moderate.

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