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September weather forecast in Itanhaém

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

	704 mmHg		83%
	3.2 m/s		+21

31 August, Sunday. day, 24°; night, 14°; rain

1 September, mon

	703 mmHg		81%
	3.2 m/s		+21

1 September, Monday. day, 24°; night, 14°; clear

2 September, tue

	703 mmHg		81%
	3.1 m/s		+21

2 September, Tuesday. day, 23°; night, 14°; clear

3 September, wed

	703 mmHg		81%
	3.3 m/s		+21

3 September, Wednesday. day, 24°; night, 14°; clear

4 September, thu

	703 mmHg		82%
	3.5 m/s		+21

4 September, Thursday. day, 22°; night, 14°; clear

5 September, fri

	704 mmHg		84%
	3.4 m/s		+21

5 September, Friday. day, 22°; night, 14°; rain

6 September, sat

	704 mmHg		87%
	3.4 m/s		+21

6 September, Saturday. day, 21°; night, 14°; rain

7 September, sun

	703 mmHg		85%
	3.3 m/s		+21

7 September, Sunday. day, 23°; night, 14°; clear

8 September, mon

	702 mmHg		81%
	3.3 m/s		+21

8 September, Monday. day, 25°; night, 15°; clear

9 September, tue

	703 mmHg		81%
	3.3 m/s		+21

9 September, Tuesday. day, 25°; night, 16°; partly cloudy

10 September, wed

	703 mmHg		82%
	3.1 m/s		+21

10 September, Wednesday. day, 24°; night, 15°; overcast

11 September, thu

	703 mmHg		82%
	3.2 m/s		+22

11 September, Thursday. day, 24°; night, 15°; partly cloudy

12 September, fri

	703 mmHg		80%
	3.4 m/s		+22

12 September, Friday. day, 24°; night, 15°; partly cloudy

13 September, sat

	703 mmHg		82%
	3.4 m/s		+21

13 September, Saturday. day, 24°; night, 15°; partly cloudy

14 September, sun

	703 mmHg		82%
	3.6 m/s		+21

14 September, Sunday. day, 24°; night, 16°; rain

15 September, mon

	703 mmHg		85%
	3.4 m/s		+21

15 September, Monday. day, 22°; night, 15°; rain

16 September, tue

	703 mmHg		86%
	3.3 m/s		+21

16 September, Tuesday. day, 22°; night, 14°; rain

17 September, wed

	703 mmHg		87%
	3.4 m/s		+21

17 September, Wednesday. day, 22°; night, 14°; rain

18 September, thu

	703 mmHg		85%
	3.6 m/s		+21

18 September, Thursday. day, 23°; night, 15°; rain

19 September, fri

	703 mmHg		84%
	3.5 m/s		+22

19 September, Friday. day, 24°; night, 15°; partly cloudy

20 September, sat

	702 mmHg		86%
	3.1 m/s		+22

20 September, Saturday. day, 23°; night, 16°; rain

21 September, sun

	702 mmHg		87%
	3.6 m/s		+22

21 September, Sunday. day, 23°; night, 15°; rain

22 September, mon

	703 mmHg		85%
	3.4 m/s		+22

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

23 September, tue

	703 mmHg		83%
	3.4 m/s		+22

23 September, Tuesday. day, 23°; night, 15°; clear

24 September, wed

	702 mmHg		83%
	3.5 m/s		+22

24 September, Wednesday. day, 23°; night, 15°; partly cloudy

25 September, thu

	703 mmHg		88%
	3.4 m/s		+22

25 September, Thursday. day, 21°; night, 15°; rain

26 September, fri

	703 mmHg		88%
	3.3 m/s		+22

26 September, Friday. day, 22°; night, 15°; rain

27 September, sat

	703 mmHg		86%
	3.4 m/s		+22

27 September, Saturday. day, 23°; night, 15°; rain

28 September, sun

	703 mmHg		86%
	3.5 m/s		+22

28 September, Sunday. day, 22°; night, 15°; rain

29 September, mon

	703 mmHg		88%
	3.3 m/s		+22

29 September, Monday. day, 22°; night, 15°; rain

30 September, tue

	703 mmHg		88%
	3.2 m/s		+22

30 September, Tuesday. day, 22°; night, 15°; rain

1 October, wed

	702 mmHg		86%
	3.5 m/s		+22

1 October, Wednesday. day, 24°; night, 16°; rain

2 October, thu

	701 mmHg		84%
	3.6 m/s		+22

2 October, Thursday. day, 24°; night, 16°; rain

3 October, fri

	702 mmHg		87%
	3.3 m/s		+22

3 October, Friday. day, 22°; night, 16°; rain

4 October, sat

	702 mmHg		86%
	3.3 m/s		+22

4 October, Saturday. day, 23°; night, 16°; overcast

Average data for 10 years

Itanhaém September

7

sunny days

15

days with precipitation

14

cloudy days

7 sunny days; 15 days with precipitation; 14 cloudy days;

84

%

air humidity

2.09

m/s

WindS

131

mm of precipitation

(6% of annual average)

+21

°C

Water temperature

air humidity 84%; 131 millimeters of precipitation (6% of annual average); Wind southerly 2.09 Meters per second; Water temperature +21°

Weather graphs for September

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

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S

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S

S

S

S

S

S

S

S

S

S

S

S

S

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S

S

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S

S

S

SE

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

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30

Daytime temperature

Night-time temperature

Cities near you

Rio de Janeiro
Sao Paulo
Florianopolis
Curitiba
Assis
Americana
Santos
Marilia
Salto

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

In September, the weather in Itanhaém is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Itanhaém has 15 rainy, 7 sunny, 7 partly cloudy, and 1 cloudy day in September. The rains are usually heavy.

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