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September weather forecast in Saint-Brieuc

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

	761 mmHg		79%
	6.4 m/s		+18

31 August, Sunday. day, 19°; night, 14°; partly cloudy

1 September, mon

	761 mmHg		80%
	6 m/s		+18

1 September, Monday. day, 18°; night, 14°; partly cloudy

2 September, tue

	761 mmHg		82%
	6.1 m/s		+18

2 September, Tuesday. day, 18°; night, 14°; partly cloudy

3 September, wed

	760 mmHg		82%
	6.5 m/s		+18

3 September, Wednesday. day, 19°; night, 15°; clear

4 September, thu

	760 mmHg		82%
	6.2 m/s		+18

4 September, Thursday. day, 18°; night, 15°; clear

5 September, fri

	760 mmHg		81%
	6.3 m/s		+18

5 September, Friday. day, 19°; night, 15°; clear

6 September, sat

	759 mmHg		83%
	7 m/s		+18

6 September, Saturday. day, 19°; night, 15°; partly cloudy

7 September, sun

	758 mmHg		82%
	6.5 m/s		+18

7 September, Sunday. day, 19°; night, 15°; partly cloudy

8 September, mon

	758 mmHg		82%
	6.7 m/s		+18

8 September, Monday. day, 19°; night, 15°; partly cloudy

9 September, tue

	759 mmHg		82%
	6.8 m/s		+18

9 September, Tuesday. day, 18°; night, 15°; rain

10 September, wed

	759 mmHg		82%
	6.8 m/s		+18

10 September, Wednesday. day, 19°; night, 15°; partly cloudy

11 September, thu

	759 mmHg		81%
	6.7 m/s		+17

11 September, Thursday. day, 18°; night, 14°; partly cloudy

12 September, fri

	760 mmHg		81%
	7 m/s		+18

12 September, Friday. day, 18°; night, 14°; rain

13 September, sat

	760 mmHg		80%
	6.9 m/s		+17

13 September, Saturday. day, 17°; night, 14°; rain

14 September, sun

	760 mmHg		79%
	7 m/s		+17

14 September, Sunday. day, 18°; night, 14°; clear

15 September, mon

	759 mmHg		80%
	6.6 m/s		+17

15 September, Monday. day, 18°; night, 14°; partly cloudy

16 September, tue

	758 mmHg		80%
	6.7 m/s		+17

16 September, Tuesday. day, 17°; night, 14°; overcast

17 September, wed

	758 mmHg		79%
	7 m/s		+17

17 September, Wednesday. day, 18°; night, 14°; rain

18 September, thu

	758 mmHg		79%
	7.5 m/s		+17

18 September, Thursday. day, 18°; night, 14°; rain

19 September, fri

	759 mmHg		80%
	6.7 m/s		+18

19 September, Friday. day, 18°; night, 14°; partly cloudy

20 September, sat

	759 mmHg		80%
	6.4 m/s		+18

20 September, Saturday. day, 18°; night, 14°; clear

21 September, sun

	759 mmHg		80%
	6.2 m/s		+18

21 September, Sunday. day, 18°; night, 14°; clear

22 September, mon

	759 mmHg		81%
	6.6 m/s		+17

22 September, Monday. day, 18°; night, 13°; clear

23 September, tue

	758 mmHg		81%
	7 m/s		+17

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

24 September, wed

	758 mmHg		80%
	7.4 m/s		+17

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

25 September, thu

	759 mmHg		80%
	6.8 m/s		+17

25 September, Thursday. day, 17°; night, 13°; rain

26 September, fri

	759 mmHg		81%
	7.3 m/s		+17

26 September, Friday. day, 17°; night, 13°; overcast

27 September, sat

	759 mmHg		81%
	7.7 m/s		+17

27 September, Saturday. day, 17°; night, 13°; rain

28 September, sun

	759 mmHg		81%
	6.7 m/s		+17

28 September, Sunday. day, 17°; night, 13°; partly cloudy

29 September, mon

	758 mmHg		80%
	7.1 m/s		+17

29 September, Monday. day, 17°; night, 13°; rain

30 September, tue

	757 mmHg		83%
	7.6 m/s		+17

30 September, Tuesday. day, 17°; night, 13°; rain

1 October, wed

	756 mmHg		83%
	8.2 m/s		+17

1 October, Wednesday. day, 17°; night, 14°; rain

2 October, thu

	757 mmHg		82%
	8.2 m/s		+17

2 October, Thursday. day, 17°; night, 13°; rain

3 October, fri

	758 mmHg		81%
	7.4 m/s		+17

3 October, Friday. day, 16°; night, 13°; partly cloudy

4 October, sat

	758 mmHg		80%
	7.5 m/s		+17

4 October, Saturday. day, 16°; night, 12°; rain

Average data for 10 years

Saint-Brieuc September

7

sunny days

11

days with precipitation

7

cloudy days

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

81

%

air humidity

5.1

m/s

WindS

55

mm of precipitation

(7% of annual average)

+17

°C

Water temperature

air humidity 81%; 55 millimeters of precipitation (7% of annual average); Wind southerly 5.1 Meters per second; Water temperature +17°

Weather graphs for September

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

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S

S

S

S

S

S

S

S

S

SW

SW

S

S

S

SW

S

S

S

S

S

S

S

S

S

SW

S

SW

S

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

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18

19

20

21

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30

Daytime temperature

Night-time temperature

Cities near you

London
Trowbridge
Brest
Looe
Bristol
Plymouth
Nantes
Rouen
Brighton

Cities with similar weather in September

Riga
Sydney
Yurmala
Palanga
Copenhagen
Vancouver
Capetown
Gdansk
Klaipeda

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

In September, the weather in Saint-Brieuc is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Saint-Brieuc has 11 rainy, 10 partly cloudy, 7 sunny, and 2 cloudy days in September. The rains are usually moderate.

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