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September weather forecast in 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

1 September, sun

	755 mmHg		77%
	4.9 m/s		+29

1 September, Sunday. day, 29°; night, 27°; rain

2 September, mon

	754 mmHg		77%
	5.1 m/s		+29

2 September, Monday. day, 29°; night, 27°; partly cloudy

3 September, tue

	754 mmHg		79%
	5.1 m/s		+29

3 September, Tuesday. day, 28°; night, 27°; rain

4 September, wed

	754 mmHg		79%
	4.5 m/s		+29

4 September, Wednesday. day, 28°; night, 26°; rain

5 September, thu

	754 mmHg		79%
	6.8 m/s		+29

5 September, Thursday. day, 29°; night, 27°; rain

6 September, fri

	754 mmHg		77%
	6.1 m/s		+29

6 September, Friday. day, 29°; night, 27°; clear

7 September, sat

	754 mmHg		76%
	5.5 m/s		+29

7 September, Saturday. day, 29°; night, 27°; partly cloudy

8 September, sun

	754 mmHg		75%
	5.4 m/s		+29

8 September, Sunday. day, 29°; night, 27°; clear

9 September, mon

	754 mmHg		75%
	5.1 m/s		+29

9 September, Monday. day, 29°; night, 27°; clear

10 September, tue

	754 mmHg		79%
	5.4 m/s		+29

10 September, Tuesday. day, 28°; night, 27°; clear

11 September, wed

	754 mmHg		76%
	5.1 m/s		+29

11 September, Wednesday. day, 29°; night, 27°; clear

12 September, thu

	754 mmHg		76%
	5 m/s		+29

12 September, Thursday. day, 29°; night, 27°; rain

13 September, fri

	754 mmHg		77%
	4.6 m/s		+29

13 September, Friday. day, 29°; night, 27°; clear

14 September, sat

	755 mmHg		77%
	4.8 m/s		+29

14 September, Saturday. day, 29°; night, 27°; clear

15 September, sun

	754 mmHg		75%
	4.9 m/s		+29

15 September, Sunday. day, 29°; night, 27°; rain

16 September, mon

	754 mmHg		76%
	4.6 m/s		+29

16 September, Monday. day, 29°; night, 27°; partly cloudy

17 September, tue

	754 mmHg		76%
	4.3 m/s		+29

17 September, Tuesday. day, 29°; night, 26°; rain

18 September, wed

	754 mmHg		77%
	5 m/s		+29

18 September, Wednesday. day, 29°; night, 27°; rain

19 September, thu

	752 mmHg		79%
	6.3 m/s		+29

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

20 September, fri

	753 mmHg		79%
	5 m/s		+29

20 September, Friday. day, 28°; night, 27°; clear

21 September, sat

	753 mmHg		79%
	5 m/s		+29

21 September, Saturday. day, 28°; night, 27°; clear

22 September, sun

	754 mmHg		79%
	4.8 m/s		+29

22 September, Sunday. day, 28°; night, 27°; rain

23 September, mon

	754 mmHg		76%
	4.8 m/s		+29

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

24 September, tue

	754 mmHg		76%
	4.9 m/s		+29

24 September, Tuesday. day, 29°; night, 27°; rain

25 September, wed

	754 mmHg		76%
	4.5 m/s		+29

25 September, Wednesday. day, 29°; night, 27°; clear

26 September, thu

	754 mmHg		77%
	4.4 m/s		+29

26 September, Thursday. day, 29°; night, 27°; partly cloudy

27 September, fri

	754 mmHg		75%
	4.9 m/s		+29

27 September, Friday. day, 29°; night, 27°; partly cloudy

28 September, sat

	754 mmHg		75%
	5.3 m/s		+29

28 September, Saturday. day, 29°; night, 27°; partly cloudy

29 September, sun

	754 mmHg		75%
	5 m/s		+29

29 September, Sunday. day, 29°; night, 27°; clear

30 September, mon

	753 mmHg		75%
	4.8 m/s		+29

30 September, Monday. day, 29°; night, 26°; partly cloudy

1 October, tue

	753 mmHg		76%
	5.3 m/s		+29

1 October, Tuesday. day, 29°; night, 27°; rain

2 October, wed

	754 mmHg		76%
	5.1 m/s		+29

2 October, Wednesday. day, 29°; night, 27°; rain

3 October, thu

	753 mmHg		75%
	5.4 m/s		+29

3 October, Thursday. day, 29°; night, 27°; partly cloudy

4 October, fri

	753 mmHg		77%
	4.5 m/s		+29

4 October, Friday. day, 29°; night, 26°; clear

5 October, sat

	753 mmHg		75%
	4.4 m/s		+29

5 October, Saturday. day, 29°; night, 27°; rain

Average data for 10 years

San Juan September

11

sunny days

12

days with precipitation

7

cloudy days

11 sunny days; 12 days with precipitation; 7 cloudy days;

76

%

air humidity

3.7

m/s

WindE

98

mm of precipitation

(13% of annual average)

+29

°C

Water temperature

air humidity 76%; 98 millimeters of precipitation (13% of annual average); Wind easterly 3.7 Meters per second; Water temperature +29°

Weather graphs for September

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

E

E

E

E

E

SE

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

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

Daytime temperature

Night-time temperature

Cities near you

Punta Cana
Santo Domingo
The Valley
Boca Chica
Las Terrenas
Christiansted
Basseterre
La Romana
Santo Domingo Este

Cities with similar weather in September

Pattaya
Nha Trang
Bangkok
Santo Domingo
Varadero
Havana
Ko Chang
Mumbai
Kinshasa

The weather forecast for September 2024 is based on historical data from the past 10 years.

September in San Juan is the hottest month of the year. In September, the weather in San Juan is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, San Juan has 12 rainy, 11 sunny, and 7 partly cloudy days in September. The rains are usually heavy. September as well as May, July, August, and October is considered the most uncomfortable time to visit San Juan.

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