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September weather forecast in Castries

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

	745 mmHg		60%
	4.1 m/s		+22

31 August, Sunday. day, 27°; night, 15°; clear

1 September, mon

	745 mmHg		58%
	3.8 m/s		+22

1 September, Monday. day, 27°; night, 15°; clear

2 September, tue

	745 mmHg		61%
	3.6 m/s		+22

2 September, Tuesday. day, 26°; night, 15°; clear

3 September, wed

	745 mmHg		64%
	3.6 m/s		+22

3 September, Wednesday. day, 26°; night, 15°; partly cloudy

4 September, thu

	745 mmHg		64%
	3.8 m/s		+22

4 September, Thursday. day, 27°; night, 15°; clear

5 September, fri

	745 mmHg		63%
	4.19 m/s		+22

5 September, Friday. day, 26°; night, 15°; clear

6 September, sat

	745 mmHg		64%
	3.9 m/s		+22

6 September, Saturday. day, 26°; night, 15°; clear

7 September, sun

	744 mmHg		66%
	4.19 m/s		+22

7 September, Sunday. day, 25°; night, 15°; rain

8 September, mon

	745 mmHg		64%
	3.9 m/s		+22

8 September, Monday. day, 26°; night, 14°; clear

9 September, tue

	745 mmHg		65%
	3.6 m/s		+22

9 September, Tuesday. day, 25°; night, 14°; clear

10 September, wed

	745 mmHg		66%
	3.7 m/s		+22

10 September, Wednesday. day, 25°; night, 14°; clear

11 September, thu

	745 mmHg		65%
	3.7 m/s		+22

11 September, Thursday. day, 26°; night, 14°; clear

12 September, fri

	744 mmHg		65%
	4.1 m/s		+22

12 September, Friday. day, 25°; night, 14°; rain

13 September, sat

	745 mmHg		66%
	4.4 m/s		+21

13 September, Saturday. day, 25°; night, 14°; clear

14 September, sun

	744 mmHg		67%
	4.3 m/s		+21

14 September, Sunday. day, 24°; night, 14°; clear

15 September, mon

	744 mmHg		65%
	3.8 m/s		+21

15 September, Monday. day, 24°; night, 13°; clear

16 September, tue

	743 mmHg		67%
	4.1 m/s		+21

16 September, Tuesday. day, 24°; night, 13°; clear

17 September, wed

	743 mmHg		68%
	4 m/s		+20

17 September, Wednesday. day, 23°; night, 13°; rain

18 September, thu

	744 mmHg		71%
	3.9 m/s		+20

18 September, Thursday. day, 23°; night, 13°; rain

19 September, fri

	744 mmHg		69%
	4.5 m/s		+20

19 September, Friday. day, 23°; night, 13°; clear

20 September, sat

	745 mmHg		67%
	3.4 m/s		+20

20 September, Saturday. day, 23°; night, 12°; clear

21 September, sun

	745 mmHg		71%
	3.4 m/s		+20

21 September, Sunday. day, 23°; night, 12°; partly cloudy

22 September, mon

	745 mmHg		72%
	3.7 m/s		+20

22 September, Monday. day, 23°; night, 13°; overcast

23 September, tue

	744 mmHg		70%
	4 m/s		+20

23 September, Tuesday. day, 23°; night, 13°; clear

24 September, wed

	744 mmHg		71%
	3.8 m/s		+20

24 September, Wednesday. day, 23°; night, 12°; rain

25 September, thu

	744 mmHg		70%
	4.19 m/s		+20

25 September, Thursday. day, 22°; night, 12°; rain

26 September, fri

	745 mmHg		69%
	4 m/s		+20

26 September, Friday. day, 22°; night, 12°; clear

27 September, sat

	746 mmHg		71%
	3.7 m/s		+20

27 September, Saturday. day, 22°; night, 11°; partly cloudy

28 September, sun

	746 mmHg		71%
	3.8 m/s		+20

28 September, Sunday. day, 23°; night, 11°; partly cloudy

29 September, mon

	745 mmHg		73%
	3.4 m/s		+20

29 September, Monday. day, 22°; night, 11°; rain

30 September, tue

	745 mmHg		74%
	3.7 m/s		+20

30 September, Tuesday. day, 22°; night, 12°; rain

1 October, wed

	745 mmHg		73%
	3.8 m/s		+20

1 October, Wednesday. day, 22°; night, 12°; clear

2 October, thu

	744 mmHg		73%
	4.4 m/s		+20

2 October, Thursday. day, 22°; night, 12°; clear

3 October, fri

	745 mmHg		70%
	4.6 m/s		+20

3 October, Friday. day, 22°; night, 12°; clear

4 October, sat

	745 mmHg		71%
	3.7 m/s		+20

4 October, Saturday. day, 21°; night, 11°; clear

Average data for 10 years

Castries September

17

sunny days

8

days with precipitation

4

cloudy days

17 sunny days; 8 days with precipitation; 4 cloudy days;

67

%

air humidity

2.5

m/s

WindSW

122

mm of precipitation

(12% of annual average)

+21

°C

Water temperature

air humidity 67%; 122 millimeters of precipitation (12% of annual average); Wind south-westerly 2.5 Meters per second; Water temperature +21°

Weather graphs for September

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

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

Barcelona
Nice
Marseilles
Geneva
Monaco
Turin
Lyon
Toulouse
Cannes

Cities with similar weather in September

Gagra
Suhum
Pitsunda
New York
Burgas
Tivat
The Sunny Beach
Porto
Pomorie

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

In September, the weather in Castries is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Castries has 17 sunny, 8 rainy, 4 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as June, July, and August is considered the most comfortable time to visit Castries.

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