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September weather forecast in Keflavík

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		83%
	11 m/s		+11

31 August, Sunday. day, 11°; night, 10°; rain

1 September, mon

	744 mmHg		81%
	10.1 m/s		+11

1 September, Monday. day, 11°; night, 10°; rain

2 September, tue

	745 mmHg		80%
	9.3 m/s		+11

2 September, Tuesday. day, 11°; night, 10°; rain

3 September, wed

	744 mmHg		83%
	8.6 m/s		+11

3 September, Wednesday. day, 12°; night, 10°; rain

4 September, thu

	748 mmHg		80%
	8.8 m/s		+11

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

5 September, fri

	747 mmHg		80%
	8.1 m/s		+11

5 September, Friday. day, 11°; night, 10°; rain

6 September, sat

	746 mmHg		81%
	11.3 m/s		+11

6 September, Saturday. day, 11°; night, 9°; rain

7 September, sun

	746 mmHg		80%
	12.3 m/s		+11

7 September, Sunday. day, 10°; night, 9°; rain

8 September, mon

	745 mmHg		79%
	10.8 m/s		+11

8 September, Monday. day, 10°; night, 9°; rain

9 September, tue

	743 mmHg		79%
	12.6 m/s		+11

9 September, Tuesday. day, 11°; night, 9°; clear

10 September, wed

	744 mmHg		79%
	11.6 m/s		+11

10 September, Wednesday. day, 10°; night, 9°; rain

11 September, thu

	743 mmHg		77%
	9.8 m/s		+11

11 September, Thursday. day, 10°; night, 9°; rain

12 September, fri

	745 mmHg		75%
	13 m/s		+11

12 September, Friday. day, 10°; night, 9°; rain

13 September, sat

	746 mmHg		79%
	12.3 m/s		+11

13 September, Saturday. day, 11°; night, 9°; clear

14 September, sun

	750 mmHg		79%
	12.1 m/s		+11

14 September, Sunday. day, 10°; night, 9°; rain

15 September, mon

	749 mmHg		81%
	11.3 m/s		+11

15 September, Monday. day, 10°; night, 9°; rain

16 September, tue

	748 mmHg		81%
	12.1 m/s		+11

16 September, Tuesday. day, 10°; night, 9°; rain

17 September, wed

	745 mmHg		80%
	11.5 m/s		+10

17 September, Wednesday. day, 9°; night, 8°; clear

18 September, thu

	745 mmHg		76%
	11 m/s		+10

18 September, Thursday. day, 9°; night, 8°; clear

19 September, fri

	743 mmHg		80%
	10.8 m/s		+10

19 September, Friday. day, 9°; night, 8°; rain

20 September, sat

	744 mmHg		75%
	10.1 m/s		+10

20 September, Saturday. day, 9°; night, 7°; partly cloudy

21 September, sun

	745 mmHg		76%
	9.8 m/s		+10

21 September, Sunday. day, 9°; night, 8°; rain

22 September, mon

	744 mmHg		79%
	8.5 m/s		+10

22 September, Monday. day, 9°; night, 8°; rain

23 September, tue

	743 mmHg		81%
	12 m/s		+10

23 September, Tuesday. day, 10°; night, 9°; rain

24 September, wed

	742 mmHg		81%
	14.1 m/s		+10

24 September, Wednesday. day, 10°; night, 9°; rain

25 September, thu

	744 mmHg		80%
	12.6 m/s		+10

25 September, Thursday. day, 10°; night, 8°; rain

26 September, fri

	744 mmHg		77%
	10.3 m/s		+10

26 September, Friday. day, 8°; night, 7°; rain

27 September, sat

	745 mmHg		75%
	9.8 m/s		+10

27 September, Saturday. day, 8°; night, 7°; rain

28 September, sun

	745 mmHg		80%
	12.6 m/s		+10

28 September, Sunday. day, 9°; night, 8°; rain

29 September, mon

	742 mmHg		77%
	11.5 m/s		+10

29 September, Monday. day, 8°; night, 7°; rain

30 September, tue

	742 mmHg		79%
	10.8 m/s		+10

30 September, Tuesday. day, 8°; night, 7°; rain

1 October, wed

	740 mmHg		80%
	11 m/s		+10

1 October, Wednesday. day, 8°; night, 6°; rain

2 October, thu

	741 mmHg		75%
	10.8 m/s		+10

2 October, Thursday. day, 7°; night, 5°; rain

3 October, fri

	740 mmHg		75%
	12.3 m/s		+9

3 October, Friday. day, 7°; night, 6°; partly cloudy

4 October, sat

	742 mmHg		73%
	12.1 m/s		+9

4 October, Saturday. day, 7°; night, 6°; rain

Average data for 10 years

Keflavík September

4

sunny days

25

days with precipitation

1

cloudy day

4 sunny days; 25 days with precipitation; 1 cloudy day;

79

%

air humidity

8.1

m/s

WindSE

142

mm of precipitation

(11% of annual average)

+11

°C

Water temperature

air humidity 79%; 142 millimeters of precipitation (11% of annual average); Wind south-easterly 8.1 Meters per second; Water temperature +11°

Weather graphs for September

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

S

SE

SE

S

SW

SE

SE

SE

SE

W

W

S

S

S

E

SE

S

S

S

S

S

SE

SE

SE

S

W

N

S

SE

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

Reykyavik
Akureyri
Torshavn
Sejdisfjordur
Isafjordur
Jan Mayen
Akranes
Selfoss
Vestmannaeyjar

Cities with similar weather in September

Cholpon-Ata
Wellington
Nuuk
Ushuaia
Christchurch
Hobart
Punta-Arenas
San-Carlos-de-Bariloche
Puerto Mont

The weather forecast for September 2024 is based on historical data from the past 10 years.

In September, the weather in Keflavík is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Keflavík has 25 rainy, 4 sunny, and 1 partly cloudy day in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Keflavík.

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