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September weather forecast in Galway

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

	760 mmHg		83%
	5.1 m/s		+15

31 August, Sunday. day, 17°; night, 10°; overcast

1 September, mon

	760 mmHg		84%
	5.1 m/s		+15

1 September, Monday. day, 17°; night, 11°; rain

2 September, tue

	759 mmHg		85%
	5 m/s		+15

2 September, Tuesday. day, 17°; night, 11°; overcast

3 September, wed

	758 mmHg		84%
	5.3 m/s		+15

3 September, Wednesday. day, 17°; night, 11°; partly cloudy

4 September, thu

	759 mmHg		85%
	5.3 m/s		+15

4 September, Thursday. day, 17°; night, 11°; rain

5 September, fri

	759 mmHg		85%
	5.5 m/s		+15

5 September, Friday. day, 17°; night, 11°; rain

6 September, sat

	758 mmHg		84%
	5.6 m/s		+15

6 September, Saturday. day, 17°; night, 11°; overcast

7 September, sun

	757 mmHg		85%
	5.2 m/s		+15

7 September, Sunday. day, 17°; night, 11°; partly cloudy

8 September, mon

	757 mmHg		85%
	5.3 m/s		+15

8 September, Monday. day, 17°; night, 11°; rain

9 September, tue

	757 mmHg		84%
	5.5 m/s		+15

9 September, Tuesday. day, 17°; night, 10°; partly cloudy

10 September, wed

	757 mmHg		86%
	5.6 m/s		+15

10 September, Wednesday. day, 16°; night, 10°; rain

11 September, thu

	756 mmHg		86%
	5.9 m/s		+15

11 September, Thursday. day, 16°; night, 10°; rain

12 September, fri

	758 mmHg		83%
	6 m/s		+15

12 September, Friday. day, 15°; night, 9°; rain

13 September, sat

	758 mmHg		84%
	6.1 m/s		+15

13 September, Saturday. day, 16°; night, 9°; rain

14 September, sun

	759 mmHg		85%
	5.4 m/s		+15

14 September, Sunday. day, 16°; night, 10°; overcast

15 September, mon

	759 mmHg		85%
	5.5 m/s		+14

15 September, Monday. day, 16°; night, 10°; overcast

16 September, tue

	758 mmHg		83%
	5.5 m/s		+14

16 September, Tuesday. day, 16°; night, 9°; partly cloudy

17 September, wed

	758 mmHg		84%
	4.9 m/s		+14

17 September, Wednesday. day, 16°; night, 9°; clear

18 September, thu

	758 mmHg		83%
	5.5 m/s		+14

18 September, Thursday. day, 15°; night, 9°; clear

19 September, fri

	758 mmHg		85%
	5.7 m/s		+14

19 September, Friday. day, 16°; night, 10°; partly cloudy

20 September, sat

	758 mmHg		84%
	5.4 m/s		+14

20 September, Saturday. day, 16°; night, 10°; partly cloudy

21 September, sun

	757 mmHg		85%
	5.9 m/s		+14

21 September, Sunday. day, 16°; night, 10°; rain

22 September, mon

	757 mmHg		85%
	5.6 m/s		+14

22 September, Monday. day, 16°; night, 9°; partly cloudy

23 September, tue

	757 mmHg		84%
	6 m/s		+14

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

24 September, wed

	756 mmHg		85%
	5.4 m/s		+14

24 September, Wednesday. day, 15°; night, 8°; rain

25 September, thu

	757 mmHg		86%
	5.7 m/s		+14

25 September, Thursday. day, 15°; night, 9°; overcast

26 September, fri

	757 mmHg		85%
	5.7 m/s		+14

26 September, Friday. day, 15°; night, 9°; rain

27 September, sat

	757 mmHg		86%
	5.9 m/s		+14

27 September, Saturday. day, 15°; night, 9°; overcast

28 September, sun

	756 mmHg		85%
	6.1 m/s		+14

28 September, Sunday. day, 15°; night, 9°; overcast

29 September, mon

	755 mmHg		86%
	5.6 m/s		+14

29 September, Monday. day, 15°; night, 9°; rain

30 September, tue

	753 mmHg		88%
	6.1 m/s		+14

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

1 October, wed

	753 mmHg		85%
	6.4 m/s		+14

1 October, Wednesday. day, 14°; night, 8°; rain

2 October, thu

	755 mmHg		85%
	6.1 m/s		+14

2 October, Thursday. day, 14°; night, 8°; overcast

3 October, fri

	755 mmHg		85%
	6.4 m/s		+14

3 October, Friday. day, 14°; night, 9°; overcast

4 October, sat

	754 mmHg		86%
	6.8 m/s		+14

4 October, Saturday. day, 13°; night, 8°; rain

Average data for 10 years

Galway September

2

sunny days

14

days with precipitation

15

cloudy days

2 sunny days; 14 days with precipitation; 15 cloudy days;

85

%

air humidity

3.9

m/s

WindSW

91

mm of precipitation

(8% of annual average)

+14

°C

Water temperature

air humidity 85%; 91 millimeters of precipitation (8% of annual average); Wind south-westerly 3.9 Meters per second; Water temperature +14°

Weather graphs for September

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

SW

SW

SW

SW

S

SW

S

S

SW

S

SW

SW

S

SW

SW

S

S

S

S

S

S

S

S

S

S

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
Carrickfinn
Cork
Wicklow
Belfast
Ballyvaughan
Cavan
Tralee
Portlaoise

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 Galway is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Galway has 14 rainy, 7 cloudy, 7 partly cloudy, and 2 sunny days in September. The rains are usually heavy.

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