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September weather forecast in São Mateus

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

	761 mmHg		74%
	5.8 m/s		+25

31 August, Sunday. day, 25°; night, 22°; rain

1 September, mon

	761 mmHg		69%
	5.6 m/s		+25

1 September, Monday. day, 25°; night, 21°; partly cloudy

2 September, tue

	761 mmHg		68%
	4.9 m/s		+25

2 September, Tuesday. day, 26°; night, 22°; partly cloudy

3 September, wed

	761 mmHg		68%
	5.5 m/s		+26

3 September, Wednesday. day, 26°; night, 22°; clear

4 September, thu

	761 mmHg		72%
	5.1 m/s		+26

4 September, Thursday. day, 26°; night, 22°; partly cloudy

5 September, fri

	762 mmHg		70%
	5.5 m/s		+25

5 September, Friday. day, 25°; night, 22°; rain

6 September, sat

	761 mmHg		69%
	5.1 m/s		+25

6 September, Saturday. day, 26°; night, 22°; clear

7 September, sun

	761 mmHg		72%
	5 m/s		+25

7 September, Sunday. day, 26°; night, 23°; clear

8 September, mon

	761 mmHg		72%
	4.9 m/s		+25

8 September, Monday. day, 26°; night, 23°; clear

9 September, tue

	762 mmHg		69%
	5 m/s		+25

9 September, Tuesday. day, 26°; night, 22°; rain

10 September, wed

	762 mmHg		67%
	5 m/s		+25

10 September, Wednesday. day, 26°; night, 22°; clear

11 September, thu

	761 mmHg		72%
	4.5 m/s		+25

11 September, Thursday. day, 26°; night, 22°; partly cloudy

12 September, fri

	761 mmHg		72%
	4.8 m/s		+25

12 September, Friday. day, 26°; night, 22°; clear

13 September, sat

	761 mmHg		69%
	5.1 m/s		+26

13 September, Saturday. day, 27°; night, 23°; rain

14 September, sun

	761 mmHg		69%
	5.5 m/s		+26

14 September, Sunday. day, 26°; night, 23°; partly cloudy

15 September, mon

	761 mmHg		70%
	5.5 m/s		+26

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

16 September, tue

	760 mmHg		69%
	5.3 m/s		+26

16 September, Tuesday. day, 26°; night, 22°; partly cloudy

17 September, wed

	761 mmHg		70%
	5.3 m/s		+26

17 September, Wednesday. day, 26°; night, 23°; partly cloudy

18 September, thu

	761 mmHg		75%
	5.5 m/s		+25

18 September, Thursday. day, 25°; night, 22°; clear

19 September, fri

	760 mmHg		69%
	5.5 m/s		+25

19 September, Friday. day, 26°; night, 23°; clear

20 September, sat

	759 mmHg		70%
	5.3 m/s		+25

20 September, Saturday. day, 27°; night, 23°; clear

21 September, sun

	760 mmHg		72%
	5.8 m/s		+25

21 September, Sunday. day, 26°; night, 22°; partly cloudy

22 September, mon

	759 mmHg		67%
	5.6 m/s		+26

22 September, Monday. day, 27°; night, 23°; partly cloudy

23 September, tue

	759 mmHg		68%
	5.1 m/s		+25

23 September, Tuesday. day, 26°; night, 23°; clear

24 September, wed

	760 mmHg		70%
	5.5 m/s		+25

24 September, Wednesday. day, 25°; night, 22°; rain

25 September, thu

	760 mmHg		70%
	5 m/s		+25

25 September, Thursday. day, 25°; night, 22°; overcast

26 September, fri

	760 mmHg		72%
	5.4 m/s		+25

26 September, Friday. day, 25°; night, 22°; rain

27 September, sat

	759 mmHg		72%
	5.6 m/s		+25

27 September, Saturday. day, 26°; night, 22°; overcast

28 September, sun

	759 mmHg		72%
	5.5 m/s		+26

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

29 September, mon

	759 mmHg		73%
	5.5 m/s		+25

29 September, Monday. day, 26°; night, 23°; rain

30 September, tue

	759 mmHg		68%
	5.3 m/s		+26

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

1 October, wed

	758 mmHg		69%
	6 m/s		+26

1 October, Wednesday. day, 27°; night, 23°; clear

2 October, thu

	759 mmHg		70%
	6 m/s		+26

2 October, Thursday. day, 27°; night, 23°; partly cloudy

3 October, fri

	760 mmHg		70%
	5.4 m/s		+26

3 October, Friday. day, 26°; night, 22°; rain

4 October, sat

	759 mmHg		70%
	5 m/s		+26

4 October, Saturday. day, 27°; night, 22°; overcast

Average data for 10 years

São Mateus September

12

sunny days

6

days with precipitation

12

cloudy days

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

70

%

air humidity

3.9

m/s

WindE

38

mm of precipitation

(4% of annual average)

+25

°C

Water temperature

air humidity 70%; 38 millimeters of precipitation (4% of annual average); Wind easterly 3.9 Meters per second; Water temperature +25°

Weather graphs for September

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

SE

E

E

SE

E

NE

NE

NE

E

E

E

NE

NE

NE

E

NE

E

E

NE

NE

NE

NE

NE

E

E

E

NE

E

NE

NE

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

Vitória
Eunápolis
Porto Seguro
Itabuna
Mucuri
Cachoeiro de Itapemirim
Guarapari

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

In September, the weather in São Mateus is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, São Mateus has 12 sunny, 10 partly cloudy, 6 rainy, and 2 cloudy days in September. The rains are usually light. September as well as May and August is considered the most comfortable time to visit São Mateus.

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