10 day forecast Monthly forecast Weather map

City or area

Go to comparison

September weather forecast in Selfoss

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		86%
	5.4 m/s		+12

31 August, Sunday. day, 12°; night, 8°; rain

1 September, mon

	744 mmHg		85%
	5.4 m/s		+12

1 September, Monday. day, 12°; night, 8°; rain

2 September, tue

	744 mmHg		83%
	4.8 m/s		+12

2 September, Tuesday. day, 12°; night, 8°; rain

3 September, wed

	745 mmHg		85%
	4.8 m/s		+12

3 September, Wednesday. day, 12°; night, 7°; rain

4 September, thu

	746 mmHg		86%
	5.2 m/s		+12

4 September, Thursday. day, 12°; night, 8°; rain

5 September, fri

	746 mmHg		85%
	4.69 m/s		+12

5 September, Friday. day, 12°; night, 7°; rain

6 September, sat

	747 mmHg		85%
	4.5 m/s		+11

6 September, Saturday. day, 11°; night, 8°; overcast

7 September, sun

	746 mmHg		83%
	5.4 m/s		+12

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

8 September, mon

	745 mmHg		81%
	5.2 m/s		+11

8 September, Monday. day, 11°; night, 7°; partly cloudy

9 September, tue

	746 mmHg		83%
	5.2 m/s		+11

9 September, Tuesday. day, 11°; night, 7°; rain

10 September, wed

	744 mmHg		85%
	5.6 m/s		+12

10 September, Wednesday. day, 11°; night, 7°; rain

11 September, thu

	744 mmHg		82%
	5.3 m/s		+11

11 September, Thursday. day, 11°; night, 7°; rain

12 September, fri

	744 mmHg		82%
	5.7 m/s		+11

12 September, Friday. day, 10°; night, 6°; rain

13 September, sat

	744 mmHg		80%
	5.2 m/s		+11

13 September, Saturday. day, 11°; night, 6°; clear

14 September, sun

	746 mmHg		80%
	5.2 m/s		+11

14 September, Sunday. day, 11°; night, 6°; clear

15 September, mon

	747 mmHg		81%
	5.3 m/s		+11

15 September, Monday. day, 10°; night, 6°; clear

16 September, tue

	746 mmHg		84%
	5.8 m/s		+11

16 September, Tuesday. day, 10°; night, 6°; rain

17 September, wed

	745 mmHg		82%
	5.3 m/s		+10

17 September, Wednesday. day, 10°; night, 6°; overcast

18 September, thu

	746 mmHg		81%
	5.1 m/s		+11

18 September, Thursday. day, 10°; night, 6°; partly cloudy

19 September, fri

	745 mmHg		85%
	5.1 m/s		+10

19 September, Friday. day, 10°; night, 6°; rain

20 September, sat

	743 mmHg		84%
	5.6 m/s		+10

20 September, Saturday. day, 10°; night, 6°; rain

21 September, sun

	744 mmHg		83%
	5.4 m/s		+10

21 September, Sunday. day, 10°; night, 5°; rain

22 September, mon

	745 mmHg		84%
	4.6 m/s		+10

22 September, Monday. day, 9°; night, 5°; rain

23 September, tue

	746 mmHg		84%
	4.3 m/s		+10

23 September, Tuesday. day, 9°; night, 5°; rain

24 September, wed

	745 mmHg		84%
	5.3 m/s		+10

24 September, Wednesday. day, 10°; night, 5°; rain

25 September, thu

	744 mmHg		82%
	5.3 m/s		+10

25 September, Thursday. day, 9°; night, 5°; partly cloudy

26 September, fri

	743 mmHg		85%
	5 m/s		+10

26 September, Friday. day, 9°; night, 6°; rain

27 September, sat

	743 mmHg		82%
	4.9 m/s		+10

27 September, Saturday. day, 9°; night, 5°; overcast

28 September, sun

	743 mmHg		82%
	4.5 m/s		+10

28 September, Sunday. day, 9°; night, 4°; partly cloudy

29 September, mon

	742 mmHg		83%
	5.8 m/s		+10

29 September, Monday. day, 9°; night, 4°; rain

30 September, tue

	741 mmHg		82%
	5.1 m/s		+10

30 September, Tuesday. day, 8°; night, 4°; rain

1 October, wed

	741 mmHg		82%
	5.4 m/s		+10

1 October, Wednesday. day, 9°; night, 5°; rain

2 October, thu

	740 mmHg		82%
	5.7 m/s		+9

2 October, Thursday. day, 8°; night, 5°; rain

3 October, fri

	741 mmHg		79%
	5.3 m/s		+9

3 October, Friday. day, 7°; night, 4°; rain

4 October, sat

	742 mmHg		80%
	5.6 m/s		+9

4 October, Saturday. day, 8°; night, 3°; clear

Average data for 10 years

Selfoss September

3

sunny days

20

days with precipitation

17

cloudy days

3 sunny days; 20 days with precipitation; 17 cloudy days;

83

%

air humidity

3.6

m/s

WindS

172

mm of precipitation

(11% of annual average)

+11

°C

Water temperature

air humidity 83%; 172 millimeters of precipitation (11% of annual average); Wind southerly 3.6 Meters per second; Water temperature +11°

Weather graphs for September

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

S

S

S

S

S

S

S

S

S

S

S

S

SE

S

S

SE

S

SE

S

S

S

S

SE

SE

SE

S

S

S

S

SE

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
Torshavn
Akureyri
Isafjordur
Jan Mayen
Vestmannaeyjar
Borgarnes
Akranes
Sejdisfjordur

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Cholpon-Ata
Oslo
Yurmala
Palanga
Dublin

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

September in Selfoss is the rainiest month of the year. In September, the weather in Selfoss is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Selfoss has 20 rainy, 4 partly cloudy, 3 sunny, and 3 cloudy days in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Selfoss.

Links

Help Terms of use Contact us

For partners

Advertisement Yandex.Weather API

Weather forecasts

Hourly forecast Detailed 10 day forecast Monthly forecast Weather map Magnetic storms

Download app

English

English
Русский

Source data: Yandex.Traffic, Roshydromet FSBI "CAO", NOAA, © OpenStreetMap

© 2017–2025 YANDEX LLC