10 day forecast Monthly forecast Weather map

City or area

Go to comparison

December weather forecast in Rio das Ostras

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

30 November, sun

	756 mmHg		82%
	4.5 m/s		+24

30 November, Sunday. day, 27°; night, 22°; rain

1 December, mon

	757 mmHg		83%
	4.4 m/s		+24

1 December, Monday. day, 27°; night, 22°; rain

2 December, tue

	757 mmHg		82%
	4.69 m/s		+25

2 December, Tuesday. day, 28°; night, 22°; rain

3 December, wed

	757 mmHg		82%
	4.8 m/s		+24

3 December, Wednesday. day, 27°; night, 22°; rain

4 December, thu

	757 mmHg		82%
	5.1 m/s		+24

4 December, Thursday. day, 27°; night, 22°; partly cloudy

5 December, fri

	756 mmHg		81%
	4.6 m/s		+24

5 December, Friday. day, 28°; night, 22°; rain

6 December, sat

	756 mmHg		82%
	4.5 m/s		+24

6 December, Saturday. day, 28°; night, 22°; rain

7 December, sun

	756 mmHg		82%
	4.4 m/s		+24

7 December, Sunday. day, 28°; night, 22°; rain

8 December, mon

	756 mmHg		84%
	4.6 m/s		+24

8 December, Monday. day, 27°; night, 22°; rain

9 December, tue

	757 mmHg		83%
	4.69 m/s		+24

9 December, Tuesday. day, 28°; night, 22°; partly cloudy

10 December, wed

	757 mmHg		82%
	4.3 m/s		+25

10 December, Wednesday. day, 27°; night, 22°; overcast

11 December, thu

	756 mmHg		82%
	4.4 m/s		+25

11 December, Thursday. day, 28°; night, 22°; overcast

12 December, fri

	756 mmHg		82%
	4.5 m/s		+24

12 December, Friday. day, 28°; night, 22°; rain

13 December, sat

	756 mmHg		83%
	4.4 m/s		+24

13 December, Saturday. day, 28°; night, 22°; rain

14 December, sun

	756 mmHg		83%
	4.6 m/s		+24

14 December, Sunday. day, 28°; night, 22°; rain

15 December, mon

	756 mmHg		82%
	4.69 m/s		+24

15 December, Monday. day, 28°; night, 22°; rain

16 December, tue

	756 mmHg		81%
	4.3 m/s		+25

16 December, Tuesday. day, 29°; night, 22°; clear

17 December, wed

	756 mmHg		81%
	4.5 m/s		+24

17 December, Wednesday. day, 29°; night, 22°; rain

18 December, thu

	757 mmHg		82%
	4.3 m/s		+24

18 December, Thursday. day, 28°; night, 22°; partly cloudy

19 December, fri

	757 mmHg		83%
	4.1 m/s		+25

19 December, Friday. day, 28°; night, 22°; rain

20 December, sat

	756 mmHg		81%
	4.3 m/s		+25

20 December, Saturday. day, 29°; night, 22°; clear

21 December, sun

	756 mmHg		81%
	4.4 m/s		+25

21 December, Sunday. day, 30°; night, 23°; clear

22 December, mon

	756 mmHg		81%
	4.19 m/s		+25

22 December, Monday. day, 30°; night, 23°; partly cloudy

23 December, tue

	756 mmHg		83%
	4.4 m/s		+25

23 December, Tuesday. day, 29°; night, 23°; rain

24 December, wed

	757 mmHg		83%
	4.4 m/s		+25

24 December, Wednesday. day, 28°; night, 23°; rain

25 December, thu

	757 mmHg		83%
	4.19 m/s		+25

25 December, Thursday. day, 29°; night, 23°; rain

26 December, fri

	757 mmHg		82%
	4.3 m/s		+25

26 December, Friday. day, 29°; night, 23°; rain

27 December, sat

	757 mmHg		81%
	4.19 m/s		+24

27 December, Saturday. day, 29°; night, 23°; clear

28 December, sun

	756 mmHg		81%
	4.1 m/s		+25

28 December, Sunday. day, 29°; night, 23°; rain

29 December, mon

	756 mmHg		81%
	4.1 m/s		+25

29 December, Monday. day, 30°; night, 23°; rain

30 December, tue

	756 mmHg		81%
	4.19 m/s		+25

30 December, Tuesday. day, 30°; night, 23°; rain

31 December, wed

	756 mmHg		81%
	4.1 m/s		+25

31 December, Wednesday. day, 30°; night, 23°; rain

1 January, thu

	755 mmHg		82%
	3.9 m/s		+25

1 January, Thursday. day, 29°; night, 23°; rain

2 January, fri

	756 mmHg		83%
	4.19 m/s		+25

2 January, Friday. day, 29°; night, 23°; rain

3 January, sat

	756 mmHg		83%
	4.1 m/s		+25

3 January, Saturday. day, 29°; night, 23°; rain

Average data for 10 years

Rio das Ostras December

4

sunny days

21

days with precipitation

14

cloudy days

4 sunny days; 21 days with precipitation; 14 cloudy days;

82

%

air humidity

2.9

m/s

WindE

230

mm of precipitation

(17% of annual average)

+25

°C

Water temperature

air humidity 82%; 230 millimeters of precipitation (17% of annual average); Wind easterly 2.9 Meters per second; Water temperature +25°

Weather graphs for December

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

SE

SE

SE

E

E

SE

SE

SE

SE

SE

SE

E

SE

SE

E

E

SE

SE

SE

E

E

E

E

SE

SE

E

E

E

E

E

E

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

31

Daytime temperature

Night-time temperature

Cities near you

Rio de Janeiro
Belo Horizonte
Vitória
Buzios
Araruama
Volta Redonda
Campos Do Jordao
Maricá
Ibirite

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

December in Rio das Ostras is the rainiest month of the year. In December, the weather in Rio das Ostras is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Rio das Ostras has 21 rainy, 4 sunny, 4 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Rio das Ostras.

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