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September weather forecast in Nyköping

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

	757 mmHg		83%
	4 m/s		+16

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

1 September, mon

	758 mmHg		83%
	4.1 m/s		+16

1 September, Monday. day, 17°; night, 10°; partly cloudy

2 September, tue

	758 mmHg		81%
	4.3 m/s		+16

2 September, Tuesday. day, 18°; night, 10°; rain

3 September, wed

	758 mmHg		82%
	4.19 m/s		+16

3 September, Wednesday. day, 17°; night, 10°; rain

4 September, thu

	758 mmHg		80%
	4.3 m/s		+16

4 September, Thursday. day, 17°; night, 10°; clear

5 September, fri

	758 mmHg		79%
	4.3 m/s		+16

5 September, Friday. day, 18°; night, 10°; clear

6 September, sat

	758 mmHg		81%
	4 m/s		+16

6 September, Saturday. day, 17°; night, 10°; partly cloudy

7 September, sun

	757 mmHg		82%
	4.1 m/s		+16

7 September, Sunday. day, 17°; night, 10°; clear

8 September, mon

	757 mmHg		82%
	4.5 m/s		+15

8 September, Monday. day, 17°; night, 10°; rain

9 September, tue

	757 mmHg		81%
	4.9 m/s		+15

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

10 September, wed

	757 mmHg		82%
	4.4 m/s		+15

10 September, Wednesday. day, 17°; night, 10°; partly cloudy

11 September, thu

	757 mmHg		84%
	4 m/s		+15

11 September, Thursday. day, 16°; night, 9°; overcast

12 September, fri

	756 mmHg		83%
	4.5 m/s		+15

12 September, Friday. day, 17°; night, 10°; rain

13 September, sat

	756 mmHg		82%
	4.8 m/s		+15

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

14 September, sun

	756 mmHg		82%
	4.9 m/s		+15

14 September, Sunday. day, 16°; night, 9°; partly cloudy

15 September, mon

	755 mmHg		81%
	4.69 m/s		+15

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

16 September, tue

	756 mmHg		81%
	4.69 m/s		+14

16 September, Tuesday. day, 15°; night, 8°; rain

17 September, wed

	757 mmHg		80%
	4.5 m/s		+14

17 September, Wednesday. day, 15°; night, 8°; partly cloudy

18 September, thu

	758 mmHg		83%
	4.19 m/s		+14

18 September, Thursday. day, 15°; night, 8°; overcast

19 September, fri

	758 mmHg		83%
	4.1 m/s		+14

19 September, Friday. day, 15°; night, 8°; rain

20 September, sat

	759 mmHg		83%
	4.4 m/s		+14

20 September, Saturday. day, 14°; night, 7°; overcast

21 September, sun

	758 mmHg		85%
	4.3 m/s		+14

21 September, Sunday. day, 15°; night, 8°; rain

22 September, mon

	757 mmHg		84%
	4.69 m/s		+14

22 September, Monday. day, 14°; night, 8°; overcast

23 September, tue

	756 mmHg		82%
	4.3 m/s		+14

23 September, Tuesday. day, 15°; night, 8°; clear

24 September, wed

	757 mmHg		83%
	4.19 m/s		+13

24 September, Wednesday. day, 14°; night, 7°; partly cloudy

25 September, thu

	758 mmHg		83%
	4.3 m/s		+13

25 September, Thursday. day, 14°; night, 7°; clear

26 September, fri

	758 mmHg		85%
	4.5 m/s		+13

26 September, Friday. day, 14°; night, 8°; overcast

27 September, sat

	756 mmHg		84%
	4.9 m/s		+13

27 September, Saturday. day, 14°; night, 8°; overcast

28 September, sun

	756 mmHg		85%
	5 m/s		+13

28 September, Sunday. day, 13°; night, 7°; rain

29 September, mon

	757 mmHg		85%
	4.6 m/s		+13

29 September, Monday. day, 13°; night, 7°; partly cloudy

30 September, tue

	757 mmHg		85%
	4.5 m/s		+12

30 September, Tuesday. day, 13°; night, 6°; clear

1 October, wed

	756 mmHg		86%
	4.8 m/s		+12

1 October, Wednesday. day, 12°; night, 6°; partly cloudy

2 October, thu

	755 mmHg		87%
	4.5 m/s		+12

2 October, Thursday. day, 12°; night, 6°; rain

3 October, fri

	755 mmHg		87%
	4.6 m/s		+12

3 October, Friday. day, 12°; night, 6°; rain

4 October, sat

	755 mmHg		86%
	4.8 m/s		+12

4 October, Saturday. day, 12°; night, 6°; partly cloudy

Average data for 10 years

Nyköping September

6

sunny days

10

days with precipitation

9

cloudy days

6 sunny days; 10 days with precipitation; 9 cloudy days;

83

%

air humidity

3.3

m/s

WindS

55

mm of precipitation

(9% of annual average)

+14

°C

Water temperature

air humidity 83%; 55 millimeters of precipitation (9% of annual average); Wind southerly 3.3 Meters per second; Water temperature +14°

Weather graphs for September

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

S

SW

SW

SW

S

S

S

S

S

S

S

S

S

S

S

S

S

SW

SW

S

S

S

SW

SW

S

S

S

S

SW

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

Stockholm
Kalmar
Örebro
Uppsala
Vetlanda
Enkoping
Hultsfred
Sandviken
Vasteras

Cities with similar weather in September

Helsinki
Riga
Tallinn
Oslo
Yurmala
Palanga
Dublin
Buenos Aires
Copenhagen

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

In September, the weather in Nyköping is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Nyköping has 10 rainy, 8 partly cloudy, 6 sunny, and 6 cloudy days in September. The rains are usually moderate.

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