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December weather forecast in Río San Juan

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

	761 mmHg		81%
	6.1 m/s		+28

30 November, Sunday. day, 26°; night, 24°; clear

1 December, mon

	761 mmHg		81%
	6.2 m/s		+28

1 December, Monday. day, 26°; night, 24°; clear

2 December, tue

	762 mmHg		81%
	6.3 m/s		+28

2 December, Tuesday. day, 26°; night, 24°; clear

3 December, wed

	762 mmHg		81%
	6 m/s		+28

3 December, Wednesday. day, 26°; night, 24°; rain

4 December, thu

	762 mmHg		81%
	6.3 m/s		+28

4 December, Thursday. day, 26°; night, 23°; rain

5 December, fri

	762 mmHg		81%
	6.4 m/s		+28

5 December, Friday. day, 26°; night, 24°; rain

6 December, sat

	762 mmHg		82%
	6.3 m/s		+28

6 December, Saturday. day, 26°; night, 24°; rain

7 December, sun

	762 mmHg		82%
	6.7 m/s		+27

7 December, Sunday. day, 26°; night, 24°; rain

8 December, mon

	762 mmHg		80%
	6.6 m/s		+27

8 December, Monday. day, 26°; night, 24°; partly cloudy

9 December, tue

	763 mmHg		81%
	6.9 m/s		+27

9 December, Tuesday. day, 26°; night, 24°; rain

10 December, wed

	762 mmHg		82%
	6.9 m/s		+27

10 December, Wednesday. day, 26°; night, 24°; rain

11 December, thu

	762 mmHg		83%
	6.9 m/s		+27

11 December, Thursday. day, 26°; night, 24°; rain

12 December, fri

	762 mmHg		81%
	6.9 m/s		+27

12 December, Friday. day, 26°; night, 24°; clear

13 December, sat

	762 mmHg		81%
	6.5 m/s		+27

13 December, Saturday. day, 26°; night, 24°; rain

14 December, sun

	762 mmHg		83%
	6.9 m/s		+27

14 December, Sunday. day, 25°; night, 23°; rain

15 December, mon

	762 mmHg		83%
	6.8 m/s		+27

15 December, Monday. day, 25°; night, 23°; rain

16 December, tue

	762 mmHg		81%
	7 m/s		+27

16 December, Tuesday. day, 25°; night, 23°; overcast

17 December, wed

	762 mmHg		81%
	6.7 m/s		+27

17 December, Wednesday. day, 25°; night, 24°; partly cloudy

18 December, thu

	762 mmHg		81%
	6.7 m/s		+27

18 December, Thursday. day, 25°; night, 24°; rain

19 December, fri

	762 mmHg		81%
	6.5 m/s		+27

19 December, Friday. day, 26°; night, 24°; clear

20 December, sat

	762 mmHg		83%
	6.6 m/s		+27

20 December, Saturday. day, 25°; night, 23°; clear

21 December, sun

	762 mmHg		83%
	6.6 m/s		+27

21 December, Sunday. day, 25°; night, 23°; rain

22 December, mon

	763 mmHg		83%
	6.6 m/s		+27

22 December, Monday. day, 25°; night, 23°; rain

23 December, tue

	763 mmHg		83%
	6.8 m/s		+27

23 December, Tuesday. day, 25°; night, 23°; rain

24 December, wed

	762 mmHg		82%
	6.9 m/s		+27

24 December, Wednesday. day, 25°; night, 23°; rain

25 December, thu

	762 mmHg		82%
	6.6 m/s		+27

25 December, Thursday. day, 25°; night, 23°; clear

26 December, fri

	762 mmHg		82%
	6.5 m/s		+27

26 December, Friday. day, 25°; night, 23°; clear

27 December, sat

	763 mmHg		82%
	6.2 m/s		+27

27 December, Saturday. day, 25°; night, 23°; clear

28 December, sun

	763 mmHg		82%
	6.7 m/s		+27

28 December, Sunday. day, 25°; night, 23°; rain

29 December, mon

	763 mmHg		81%
	6.8 m/s		+27

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

30 December, tue

	763 mmHg		81%
	6.7 m/s		+27

30 December, Tuesday. day, 25°; night, 23°; rain

31 December, wed

	764 mmHg		80%
	6.9 m/s		+27

31 December, Wednesday. day, 25°; night, 23°; rain

1 January, thu

	764 mmHg		81%
	7.2 m/s		+27

1 January, Thursday. day, 25°; night, 23°; rain

2 January, fri

	763 mmHg		80%
	7.2 m/s		+27

2 January, Friday. day, 25°; night, 23°; rain

3 January, sat

	763 mmHg		79%
	7 m/s		+27

3 January, Saturday. day, 25°; night, 23°; clear

Average data for 10 years

Río San Juan December

8

sunny days

20

days with precipitation

2

cloudy days

8 sunny days; 20 days with precipitation; 2 cloudy days;

82

%

air humidity

5.2

m/s

WindE

115

mm of precipitation

(11% of annual average)

+27

°C

Water temperature

air humidity 82%; 115 millimeters of precipitation (11% of annual average); Wind easterly 5.2 Meters per second; Water temperature +27°

Weather graphs for December

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

E

E

E

E

E

E

SE

E

E

SE

E

E

SE

SE

E

E

E

E

E

SE

E

E

SE

SE

SE

SE

SE

SE

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

Punta Cana
Santo Domingo
Puerto Plata
La Romana
Boca Chica
Bayahibe
Samana
Santo Domingo Este
Port-au-Prince

Cities with similar weather in December

Miami
Sharjah
Varadero
Havana
Cancun
Ajman
Miami Beach
Brisbane
Honolulu

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

In December, the weather in Río San Juan is typically warm. Average daily high temperature in December is about 25 degrees above zero. On average, Río San Juan has 20 rainy, 8 sunny, 2 partly cloudy, and 1 cloudy day in December. The rains are usually heavy. December as well as January, May, June, and July is considered the most uncomfortable time to visit Río San Juan.

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