10 day forecast Monthly forecast Weather map

City or area

Go to comparison

September weather forecast in Rio de Janeiro

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

	762 mmHg		76%
	3.3 m/s		+23

31 August, Sunday. day, 27°; night, 17°; clear

1 September, mon

	761 mmHg		75%
	3.3 m/s		+22

1 September, Monday. day, 27°; night, 18°; clear

2 September, tue

	761 mmHg		75%
	3.4 m/s		+24

2 September, Tuesday. day, 27°; night, 18°; clear

3 September, wed

	761 mmHg		75%
	3.5 m/s		+23

3 September, Wednesday. day, 28°; night, 18°; clear

4 September, thu

	761 mmHg		76%
	3.4 m/s		+23

4 September, Thursday. day, 26°; night, 18°; clear

5 September, fri

	762 mmHg		77%
	3.6 m/s		+23

5 September, Friday. day, 26°; night, 18°; partly cloudy

6 September, sat

	762 mmHg		79%
	3.3 m/s		+23

6 September, Saturday. day, 25°; night, 17°; rain

7 September, sun

	762 mmHg		78%
	3.4 m/s		+24

7 September, Sunday. day, 26°; night, 17°; clear

8 September, mon

	761 mmHg		76%
	3.3 m/s		+24

8 September, Monday. day, 28°; night, 17°; clear

9 September, tue

	760 mmHg		74%
	3.3 m/s		+23

9 September, Tuesday. day, 29°; night, 18°; clear

10 September, wed

	761 mmHg		76%
	3.6 m/s		+24

10 September, Wednesday. day, 28°; night, 18°; clear

11 September, thu

	761 mmHg		77%
	3.4 m/s		+24

11 September, Thursday. day, 27°; night, 19°; clear

12 September, fri

	761 mmHg		74%
	3.3 m/s		+24

12 September, Friday. day, 27°; night, 18°; clear

13 September, sat

	760 mmHg		75%
	3.5 m/s		+24

13 September, Saturday. day, 28°; night, 18°; clear

14 September, sun

	760 mmHg		76%
	3.6 m/s		+24

14 September, Sunday. day, 28°; night, 19°; rain

15 September, mon

	761 mmHg		77%
	3.6 m/s		+24

15 September, Monday. day, 27°; night, 19°; overcast

16 September, tue

	761 mmHg		79%
	3.7 m/s		+24

16 September, Tuesday. day, 26°; night, 18°; rain

17 September, wed

	761 mmHg		79%
	3.3 m/s		+24

17 September, Wednesday. day, 26°; night, 18°; rain

18 September, thu

	761 mmHg		79%
	3.5 m/s		+25

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

19 September, fri

	760 mmHg		76%
	3.4 m/s		+25

19 September, Friday. day, 28°; night, 18°; partly cloudy

20 September, sat

	760 mmHg		77%
	3.3 m/s		+23

20 September, Saturday. day, 28°; night, 19°; partly cloudy

21 September, sun

	759 mmHg		79%
	3.9 m/s		+24

21 September, Sunday. day, 27°; night, 19°; rain

22 September, mon

	760 mmHg		79%
	3.6 m/s		+24

22 September, Monday. day, 26°; night, 18°; rain

23 September, tue

	760 mmHg		76%
	3.4 m/s		+23

23 September, Tuesday. day, 27°; night, 18°; partly cloudy

24 September, wed

	760 mmHg		76%
	3.7 m/s		+23

24 September, Wednesday. day, 28°; night, 18°; clear

25 September, thu

	761 mmHg		79%
	3.6 m/s		+23

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

26 September, fri

	761 mmHg		79%
	3.5 m/s		+23

26 September, Friday. day, 26°; night, 18°; rain

27 September, sat

	760 mmHg		78%
	3.4 m/s		+23

27 September, Saturday. day, 27°; night, 18°; rain

28 September, sun

	761 mmHg		79%
	3.3 m/s		+23

28 September, Sunday. day, 26°; night, 19°; rain

29 September, mon

	761 mmHg		80%
	3.5 m/s		+23

29 September, Monday. day, 26°; night, 19°; rain

30 September, tue

	761 mmHg		81%
	3.2 m/s		+24

30 September, Tuesday. day, 26°; night, 19°; rain

1 October, wed

	759 mmHg		79%
	3.4 m/s		+24

1 October, Wednesday. day, 27°; night, 19°; partly cloudy

2 October, thu

	758 mmHg		78%
	3.6 m/s		+23

2 October, Thursday. day, 28°; night, 20°; rain

3 October, fri

	759 mmHg		80%
	3.2 m/s		+23

3 October, Friday. day, 26°; night, 19°; rain

4 October, sat

	760 mmHg		81%
	3.3 m/s		+23

4 October, Saturday. day, 26°; night, 19°; rain

Average data for 10 years

Rio de Janeiro September

12

sunny days

12

days with precipitation

8

cloudy days

12 sunny days; 12 days with precipitation; 8 cloudy days;

77

%

air humidity

1.9

m/s

WindSE

83

mm of precipitation

(5% of annual average)

+24

°C

Water temperature

air humidity 77%; 83 millimeters of precipitation (5% of annual average); Wind south-easterly 1.9 Meters per second; Water temperature +24°

Weather graphs for September

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

SE

SE

S

S

S

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

S

SE

SE

SE

SE

S

SE

S

S

SE

S

S

S

SE

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

Sao Paulo
Belo Horizonte
Vitória
Santos
Buzios
Rio das Ostras
Araruama
Itaquaquecetuba
Volta Redonda

Cities with similar weather in September

Barcelona
Los Angeles
Heraklion
Salou
Malaga
Alicante
Retimno
Hersonisos
Kos

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

September in Rio de Janeiro is the windiest month of the year. In September, the weather in Rio de Janeiro is typically warm. Average daily high temperature in September is about 27 degrees above zero. On average, Rio de Janeiro has 12 rainy, 12 sunny, 5 partly cloudy, and 1 cloudy day in September. The rains are usually heavy.

Links

Help Terms of use Contact us

For partners

Advertisement Yandex.Weather API

Weather forecasts

Hourly forecast Detailed 10 day forecast Monthly forecast Weather map Magnetic storms

Download app

English

English
Русский

Source data: Yandex.Traffic, Roshydromet FSBI "CAO", NOAA, © OpenStreetMap

© 2017–2025 YANDEX LLC