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September weather forecast in Ny-Alesund

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

	763 mmHg		87%
	6.1 m/s		+1

31 August, Sunday. day, 2°; night, 0°; rain

1 September, mon

	764 mmHg		87%
	5.4 m/s		+1

1 September, Monday. day, 2°; night, 1°; rain

2 September, tue

	761 mmHg		87%
	5.6 m/s		+1

2 September, Tuesday. day, 2°; night, 1°; rain

3 September, wed

	761 mmHg		88%
	6 m/s		+1

3 September, Wednesday. day, 2°; night, 1°; overcast

4 September, thu

	761 mmHg		88%
	5.4 m/s		+1

4 September, Thursday. day, 3°; night, 2°; rain

5 September, fri

	762 mmHg		91%
	6 m/s		+1

5 September, Friday. day, 2°; night, 1°; rain

6 September, sat

	761 mmHg		87%
	6.6 m/s		+1

6 September, Saturday. day, 2°; night, 1°; rain

7 September, sun

	762 mmHg		89%
	5.9 m/s		+1

7 September, Sunday. day, 2°; night, 1°; rain

8 September, mon

	764 mmHg		89%
	6.1 m/s		+1

8 September, Monday. day, 2°; night, 1°; overcast

9 September, tue

	766 mmHg		87%
	4.8 m/s		+1

9 September, Tuesday. day, 2°; night, 1°; overcast

10 September, wed

	765 mmHg		86%
	5 m/s		+1

10 September, Wednesday. day, 2°; night, 1°; rain

11 September, thu

	765 mmHg		81%
	6.4 m/s		+1

11 September, Thursday. day, 3°; night, 1°; rain

12 September, fri

	764 mmHg		79%
	6.5 m/s		+1

12 September, Friday. day, 4°; night, 2°; rain

13 September, sat

	764 mmHg		82%
	7.8 m/s		0

13 September, Saturday. day, 3°; night, 2°; clear

14 September, sun

	764 mmHg		83%
	6.1 m/s		0

14 September, Sunday. day, 1°; night, 1°; rain

15 September, mon

	763 mmHg		87%
	6.8 m/s		+1

15 September, Monday. day, 2°; night, 1°; clear

16 September, tue

	763 mmHg		87%
	7.1 m/s		+1

16 September, Tuesday. day, 2°; night, 1°; rain

17 September, wed

	764 mmHg		89%
	8.6 m/s		0

17 September, Wednesday. day, 3°; night, 1°; overcast

18 September, thu

	765 mmHg		85%
	6.6 m/s		+1

18 September, Thursday. day, 3°; night, 2°; rain

19 September, fri

	766 mmHg		82%
	5.9 m/s		0

19 September, Friday. day, 2°; night, 1°; overcast

20 September, sat

	766 mmHg		83%
	5.4 m/s		0

20 September, Saturday. day, 2°; night, 0°; rain

21 September, sun

	764 mmHg		87%
	6.1 m/s		+1

21 September, Sunday. day, 2°; night, 2°; rain

22 September, mon

	765 mmHg		88%
	7.3 m/s		+1

22 September, Monday. day, 3°; night, 2°; rain

23 September, tue

	768 mmHg		87%
	5.5 m/s		+1

23 September, Tuesday. day, 2°; night, 1°; rain

24 September, wed

	768 mmHg		87%
	6 m/s		0

24 September, Wednesday. day, 1°; night, 1°; rain

25 September, thu

	766 mmHg		87%
	6 m/s		0

25 September, Thursday. day, 0°; night, 0°; overcast

26 September, fri

	766 mmHg		87%
	6.3 m/s		0

26 September, Friday. day, 1°; night, 0°; rain

27 September, sat

	763 mmHg		89%
	7.5 m/s		0

27 September, Saturday. day, 1°; night, 0°; rain

28 September, sun

	762 mmHg		88%
	7 m/s		0

28 September, Sunday. day, 0°; night, 0°; overcast

29 September, mon

	763 mmHg		87%
	7.5 m/s		0

29 September, Monday. day, 0°; night, -1°; snow

30 September, tue

	760 mmHg		85%
	7.9 m/s		0

30 September, Tuesday. day, -1°; night, -2°; snow

1 October, wed

	758 mmHg		81%
	7.1 m/s		0

1 October, Wednesday. day, -1°; night, -2°; snow

2 October, thu

	761 mmHg		82%
	6.9 m/s		0

2 October, Thursday. day, 0°; night, -2°; snow

3 October, fri

	763 mmHg		81%
	7.5 m/s		0

3 October, Friday. day, -2°; night, -2°; partly cloudy

4 October, sat

	764 mmHg		81%
	7 m/s		0

4 October, Saturday. day, -2°; night, -3°; snow

Average data for 10 years

Ny-Alesund September

2

sunny days

21

days with precipitation

7

cloudy days

2 sunny days; 21 days with precipitation; 7 cloudy days;

87

%

air humidity

4.8

m/s

WindSE

90

mm of precipitation

(15% of annual average)

+1

°C

Water temperature

air humidity 87%; 90 millimeters of precipitation (15% of annual average); Wind south-easterly 4.8 Meters per second; Water temperature +1°

Weather graphs for September

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

SE

E

NE

SE

SE

SE

E

E

SE

SE

SE

SE

SE

E

SE

SE

SE

SE

SE

SE

SE

SE

E

SE

E

E

SE

E

NE

E

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

Longyearbyen
Tromsø
Bodø
Andenes
Narvik
Svolver
Stokmarknes
Svalbard Airport
Hornsund

Cities with similar weather in September

Nuuk
Ushuaia
Punta-Arenas
San-Carlos-de-Bariloche
Shiquanhe
Coyhaique

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

September in Ny-Alesund is the rainiest month of the year. In September, the weather in Ny-Alesund is typically cold. Average daily high temperature in September is about 2 degrees above zero. On average, Ny-Alesund has 19 rainy, 7 cloudy, 2 snowy, and 2 sunny days in September. The rains are usually heavy. September as well as March, June, July, and August is considered the most uncomfortable time to visit Ny-Alesund.

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