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September weather forecast in Holyhead

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

	764 mmHg		81%
	8.39 m/s		+16

31 August, Sunday. day, 15°; night, 14°; rain

1 September, mon

	764 mmHg		82%
	8 m/s		+16

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

2 September, tue

	763 mmHg		86%
	8.39 m/s		+16

2 September, Tuesday. day, 15°; night, 14°; overcast

3 September, wed

	762 mmHg		84%
	8.8 m/s		+16

3 September, Wednesday. day, 15°; night, 14°; rain

4 September, thu

	763 mmHg		83%
	8.2 m/s		+16

4 September, Thursday. day, 15°; night, 14°; clear

5 September, fri

	762 mmHg		84%
	8.89 m/s		+15

5 September, Friday. day, 16°; night, 14°; rain

6 September, sat

	761 mmHg		83%
	9.7 m/s		+15

6 September, Saturday. day, 15°; night, 14°; rain

7 September, sun

	761 mmHg		84%
	9.2 m/s		+16

7 September, Sunday. day, 15°; night, 14°; partly cloudy

8 September, mon

	761 mmHg		83%
	9.3 m/s		+16

8 September, Monday. day, 15°; night, 14°; rain

9 September, tue

	761 mmHg		82%
	9.2 m/s		+16

9 September, Tuesday. day, 15°; night, 14°; clear

10 September, wed

	761 mmHg		82%
	9.3 m/s		+16

10 September, Wednesday. day, 15°; night, 14°; rain

11 September, thu

	760 mmHg		83%
	9.7 m/s		+15

11 September, Thursday. day, 15°; night, 14°; rain

12 September, fri

	761 mmHg		80%
	9.8 m/s		+15

12 September, Friday. day, 15°; night, 13°; rain

13 September, sat

	762 mmHg		79%
	10.2 m/s		+15

13 September, Saturday. day, 15°; night, 13°; clear

14 September, sun

	762 mmHg		81%
	9.39 m/s		+15

14 September, Sunday. day, 15°; night, 13°; partly cloudy

15 September, mon

	762 mmHg		82%
	9.3 m/s		+15

15 September, Monday. day, 15°; night, 13°; partly cloudy

16 September, tue

	762 mmHg		80%
	9.5 m/s		+15

16 September, Tuesday. day, 15°; night, 13°; clear

17 September, wed

	762 mmHg		79%
	9 m/s		+15

17 September, Wednesday. day, 15°; night, 13°; partly cloudy

18 September, thu

	761 mmHg		80%
	9.39 m/s		+15

18 September, Thursday. day, 15°; night, 13°; rain

19 September, fri

	762 mmHg		81%
	9.6 m/s		+15

19 September, Friday. day, 15°; night, 13°; partly cloudy

20 September, sat

	762 mmHg		81%
	9.2 m/s		+15

20 September, Saturday. day, 15°; night, 14°; partly cloudy

21 September, sun

	762 mmHg		81%
	9.6 m/s		+15

21 September, Sunday. day, 15°; night, 13°; clear

22 September, mon

	762 mmHg		81%
	9.6 m/s		+15

22 September, Monday. day, 15°; night, 13°; rain

23 September, tue

	761 mmHg		79%
	10.2 m/s		+15

23 September, Tuesday. day, 15°; night, 13°; overcast

24 September, wed

	760 mmHg		79%
	10.2 m/s		+15

24 September, Wednesday. day, 14°; night, 13°; rain

25 September, thu

	761 mmHg		81%
	9.5 m/s		+15

25 September, Thursday. day, 14°; night, 13°; partly cloudy

26 September, fri

	761 mmHg		81%
	9.7 m/s		+15

26 September, Friday. day, 14°; night, 13°; rain

27 September, sat

	761 mmHg		79%
	9.8 m/s		+15

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

28 September, sun

	761 mmHg		79%
	10.1 m/s		+15

28 September, Sunday. day, 15°; night, 13°; rain

29 September, mon

	760 mmHg		80%
	10.2 m/s		+15

29 September, Monday. day, 14°; night, 13°; rain

30 September, tue

	758 mmHg		82%
	11 m/s		+15

30 September, Tuesday. day, 15°; night, 13°; rain

1 October, wed

	757 mmHg		80%
	10.5 m/s		+15

1 October, Wednesday. day, 14°; night, 13°; rain

2 October, thu

	759 mmHg		77%
	10.7 m/s		+15

2 October, Thursday. day, 14°; night, 13°; partly cloudy

3 October, fri

	759 mmHg		78%
	11.3 m/s		+15

3 October, Friday. day, 14°; night, 12°; rain

4 October, sat

	758 mmHg		77%
	11.8 m/s		+14

4 October, Saturday. day, 14°; night, 12°; rain

Average data for 10 years

Holyhead September

5

sunny days

15

days with precipitation

9

cloudy days

5 sunny days; 15 days with precipitation; 9 cloudy days;

81

%

air humidity

7.1

m/s

WindS

93

mm of precipitation

(9% of annual average)

+15

°C

Water temperature

air humidity 81%; 93 millimeters of precipitation (9% of annual average); Wind southerly 7.1 Meters per second; Water temperature +15°

Weather graphs for September

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

SW

S

SW

S

S

SW

S

SW

SW

S

SW

SW

S

SW

S

S

S

S

S

S

S

S

S

S

SW

S

SW

SW

S

S

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

Dublin
Edinburgh
Manchester
Liverpool
Trowbridge
Oxford
Glasgow
Bournemouth
Wicklow

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Oslo
Yurmala
Palanga
Buenos Aires
Copenhagen

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

In September, the weather in Holyhead is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Holyhead has 15 rainy, 8 partly cloudy, 5 sunny, and 2 cloudy days in September. The rains are usually heavy.

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