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September weather forecast in Borgarnes

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

	744 mmHg		85%
	5.5 m/s		+11

31 August, Sunday. day, 11°; night, 7°; rain

1 September, mon

	743 mmHg		84%
	5.3 m/s		+11

1 September, Monday. day, 12°; night, 7°; rain

2 September, tue

	744 mmHg		82%
	5.2 m/s		+11

2 September, Tuesday. day, 11°; night, 6°; rain

3 September, wed

	744 mmHg		83%
	4.8 m/s		+11

3 September, Wednesday. day, 12°; night, 6°; rain

4 September, thu

	744 mmHg		84%
	5.1 m/s		+11

4 September, Thursday. day, 11°; night, 6°; rain

5 September, fri

	745 mmHg		84%
	5 m/s		+11

5 September, Friday. day, 11°; night, 6°; partly cloudy

6 September, sat

	746 mmHg		85%
	5 m/s		+11

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

7 September, sun

	745 mmHg		83%
	5.6 m/s		+11

7 September, Sunday. day, 11°; night, 6°; rain

8 September, mon

	744 mmHg		81%
	5.6 m/s		+11

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

9 September, tue

	745 mmHg		83%
	5.4 m/s		+11

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

10 September, wed

	743 mmHg		84%
	6 m/s		+11

10 September, Wednesday. day, 10°; night, 6°; rain

11 September, thu

	743 mmHg		82%
	5.2 m/s		+11

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

12 September, fri

	744 mmHg		83%
	6 m/s		+11

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

13 September, sat

	744 mmHg		80%
	5.5 m/s		+11

13 September, Saturday. day, 10°; night, 5°; clear

14 September, sun

	745 mmHg		80%
	5.2 m/s		+10

14 September, Sunday. day, 10°; night, 4°; partly cloudy

15 September, mon

	746 mmHg		81%
	5.5 m/s		+10

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

16 September, tue

	745 mmHg		83%
	5.8 m/s		+10

16 September, Tuesday. day, 10°; night, 5°; rain

17 September, wed

	744 mmHg		81%
	5.6 m/s		+10

17 September, Wednesday. day, 10°; night, 5°; overcast

18 September, thu

	745 mmHg		80%
	5.1 m/s		+10

18 September, Thursday. day, 9°; night, 5°; clear

19 September, fri

	744 mmHg		85%
	5.4 m/s		+10

19 September, Friday. day, 9°; night, 5°; rain

20 September, sat

	742 mmHg		84%
	5.4 m/s		+10

20 September, Saturday. day, 9°; night, 5°; rain

21 September, sun

	743 mmHg		84%
	5.3 m/s		+10

21 September, Sunday. day, 9°; night, 4°; rain

22 September, mon

	744 mmHg		83%
	4.9 m/s		+10

22 September, Monday. day, 8°; night, 4°; overcast

23 September, tue

	745 mmHg		84%
	4.5 m/s		+10

23 September, Tuesday. day, 8°; night, 3°; rain

24 September, wed

	744 mmHg		85%
	5.2 m/s		+10

24 September, Wednesday. day, 9°; night, 4°; overcast

25 September, thu

	743 mmHg		84%
	5.2 m/s		+10

25 September, Thursday. day, 8°; night, 4°; overcast

26 September, fri

	742 mmHg		85%
	5.4 m/s		+10

26 September, Friday. day, 8°; night, 4°; rain

27 September, sat

	743 mmHg		83%
	5.1 m/s		+9

27 September, Saturday. day, 8°; night, 3°; rain

28 September, sun

	743 mmHg		83%
	4.6 m/s		+9

28 September, Sunday. day, 8°; night, 3°; partly cloudy

29 September, mon

	741 mmHg		84%
	5.6 m/s		+9

29 September, Monday. day, 7°; night, 3°; rain

30 September, tue

	740 mmHg		82%
	5.1 m/s		+9

30 September, Tuesday. day, 8°; night, 3°; overcast

1 October, wed

	740 mmHg		85%
	5.5 m/s		+9

1 October, Wednesday. day, 8°; night, 3°; rain

2 October, thu

	739 mmHg		85%
	5.7 m/s		+9

2 October, Thursday. day, 7°; night, 3°; rain

3 October, fri

	740 mmHg		82%
	5.5 m/s		+9

3 October, Friday. day, 6°; night, 2°; rain

4 October, sat

	741 mmHg		83%
	5.6 m/s		+9

4 October, Saturday. day, 6°; night, 2°; partly cloudy

Average data for 10 years

Borgarnes September

2

sunny days

18

days with precipitation

19

cloudy days

2 sunny days; 18 days with precipitation; 19 cloudy days;

83

%

air humidity

3.6

m/s

WindSE

137

mm of precipitation

(11% of annual average)

+10

°C

Water temperature

air humidity 83%; 137 millimeters of precipitation (11% of annual average); Wind south-easterly 3.6 Meters per second; Water temperature +10°

Weather graphs for September

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

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SE

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E

1

Average data for 10 years

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3

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11

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30

Daytime temperature

Night-time temperature

Cities near you

Reykyavik
Torshavn
Akureyri
Isafjordur
Jan Mayen
Selfoss
Vestmannaeyjar
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 Borgarnes is the rainiest month of the year. In September, the weather in Borgarnes is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Borgarnes has 18 rainy, 7 cloudy, 3 partly cloudy, and 2 sunny 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 Borgarnes.

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