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September weather forecast in Dundalk

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

	750 mmHg		82%
	4.69 m/s		+15

31 August, Sunday. day, 17°; night, 11°; partly cloudy

1 September, mon

	749 mmHg		84%
	4.8 m/s		+16

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

2 September, tue

	748 mmHg		85%
	4.6 m/s		+15

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

3 September, wed

	748 mmHg		84%
	5.2 m/s		+16

3 September, Wednesday. day, 17°; night, 11°; overcast

4 September, thu

	748 mmHg		84%
	5.1 m/s		+15

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

5 September, fri

	748 mmHg		84%
	5.4 m/s		+15

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

6 September, sat

	747 mmHg		84%
	5.6 m/s		+14

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

7 September, sun

	747 mmHg		85%
	5.1 m/s		+16

7 September, Sunday. day, 17°; night, 11°; rain

8 September, mon

	746 mmHg		84%
	5.1 m/s		+16

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

9 September, tue

	747 mmHg		84%
	5.4 m/s		+15

9 September, Tuesday. day, 17°; night, 11°; rain

10 September, wed

	746 mmHg		85%
	5.1 m/s		+15

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

11 September, thu

	746 mmHg		85%
	5.6 m/s		+15

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

12 September, fri

	747 mmHg		84%
	5.5 m/s		+15

12 September, Friday. day, 16°; night, 9°; rain

13 September, sat

	747 mmHg		83%
	5.7 m/s		+14

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

14 September, sun

	748 mmHg		83%
	5.3 m/s		+14

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

15 September, mon

	748 mmHg		85%
	5.2 m/s		+14

15 September, Monday. day, 15°; night, 10°; partly cloudy

16 September, tue

	748 mmHg		83%
	5.4 m/s		+14

16 September, Tuesday. day, 15°; night, 9°; partly cloudy

17 September, wed

	748 mmHg		83%
	4.8 m/s		+14

17 September, Wednesday. day, 16°; night, 9°; partly cloudy

18 September, thu

	747 mmHg		83%
	5.2 m/s		+14

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

19 September, fri

	748 mmHg		85%
	5.1 m/s		+14

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

20 September, sat

	747 mmHg		84%
	5.1 m/s		+15

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

21 September, sun

	747 mmHg		84%
	5.5 m/s		+15

21 September, Sunday. day, 16°; night, 10°; partly cloudy

22 September, mon

	747 mmHg		84%
	5.5 m/s		+14

22 September, Monday. day, 15°; night, 9°; partly cloudy

23 September, tue

	747 mmHg		84%
	5.9 m/s		+14

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

24 September, wed

	746 mmHg		84%
	5.6 m/s		+14

24 September, Wednesday. day, 15°; night, 9°; partly cloudy

25 September, thu

	746 mmHg		85%
	5.5 m/s		+14

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

26 September, fri

	746 mmHg		84%
	5.6 m/s		+15

26 September, Friday. day, 15°; night, 10°; overcast

27 September, sat

	746 mmHg		84%
	5.5 m/s		+15

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

28 September, sun

	746 mmHg		84%
	5.7 m/s		+15

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

29 September, mon

	745 mmHg		85%
	5.3 m/s		+14

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

30 September, tue

	743 mmHg		88%
	5.9 m/s		+14

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

1 October, wed

	743 mmHg		84%
	6.1 m/s		+13

1 October, Wednesday. day, 14°; night, 9°; rain

2 October, thu

	744 mmHg		84%
	5.8 m/s		+13

2 October, Thursday. day, 14°; night, 8°; partly cloudy

3 October, fri

	744 mmHg		83%
	6.3 m/s		+13

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

4 October, sat

	744 mmHg		84%
	6.3 m/s		+14

4 October, Saturday. day, 13°; night, 9°; rain

Average data for 10 years

Dundalk September

2

sunny days

13

days with precipitation

14

cloudy days

2 sunny days; 13 days with precipitation; 14 cloudy days;

84

%

air humidity

3.8

m/s

WindSW

74

mm of precipitation

(8% of annual average)

+15

°C

Water temperature

air humidity 84%; 74 millimeters of precipitation (8% of annual average); Wind south-westerly 3.8 Meters per second; Water temperature +15°

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

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

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28

29

30

Daytime temperature

Night-time temperature

Cities near you

Dublin
Edinburgh
Liverpool
Carrickfinn
Glasgow
Cork
Galway
Wicklow
Belfast

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 Dundalk is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Dundalk has 13 rainy, 8 partly cloudy, 7 cloudy, and 2 sunny days in September. The rains are usually moderate.

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