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September weather forecast in Arendal

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

	755 mmHg		76%
	4.3 m/s		+17

31 August, Sunday. day, 18°; night, 10°; partly cloudy

1 September, mon

	756 mmHg		75%
	4.6 m/s		+17

1 September, Monday. day, 18°; night, 10°; partly cloudy

2 September, tue

	756 mmHg		77%
	4.9 m/s		+17

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

3 September, wed

	755 mmHg		75%
	4.8 m/s		+17

3 September, Wednesday. day, 18°; night, 11°; clear

4 September, thu

	755 mmHg		78%
	4.8 m/s		+17

4 September, Thursday. day, 18°; night, 11°; clear

5 September, fri

	755 mmHg		76%
	4.69 m/s		+17

5 September, Friday. day, 18°; night, 11°; clear

6 September, sat

	755 mmHg		79%
	4.9 m/s		+16

6 September, Saturday. day, 17°; night, 11°; overcast

7 September, sun

	754 mmHg		79%
	5.2 m/s		+16

7 September, Sunday. day, 18°; night, 11°; rain

8 September, mon

	754 mmHg		78%
	5.4 m/s		+17

8 September, Monday. day, 17°; night, 11°; overcast

9 September, tue

	754 mmHg		76%
	5.5 m/s		+16

9 September, Tuesday. day, 18°; night, 11°; rain

10 September, wed

	754 mmHg		79%
	5.3 m/s		+17

10 September, Wednesday. day, 17°; night, 11°; rain

11 September, thu

	753 mmHg		82%
	5.3 m/s		+16

11 September, Thursday. day, 16°; night, 10°; rain

12 September, fri

	752 mmHg		78%
	5.5 m/s		+16

12 September, Friday. day, 17°; night, 10°; partly cloudy

13 September, sat

	753 mmHg		77%
	5.9 m/s		+16

13 September, Saturday. day, 16°; night, 10°; rain

14 September, sun

	753 mmHg		78%
	5.7 m/s		+16

14 September, Sunday. day, 16°; night, 10°; rain

15 September, mon

	753 mmHg		77%
	5.5 m/s		+16

15 September, Monday. day, 16°; night, 9°; rain

16 September, tue

	753 mmHg		77%
	5.4 m/s		+15

16 September, Tuesday. day, 15°; night, 9°; partly cloudy

17 September, wed

	754 mmHg		75%
	5.4 m/s		+16

17 September, Wednesday. day, 15°; night, 9°; rain

18 September, thu

	754 mmHg		77%
	5 m/s		+16

18 September, Thursday. day, 16°; night, 9°; clear

19 September, fri

	755 mmHg		78%
	4.69 m/s		+15

19 September, Friday. day, 16°; night, 9°; clear

20 September, sat

	756 mmHg		80%
	4.8 m/s		+15

20 September, Saturday. day, 15°; night, 8°; partly cloudy

21 September, sun

	755 mmHg		79%
	5 m/s		+15

21 September, Sunday. day, 16°; night, 9°; overcast

22 September, mon

	754 mmHg		79%
	5.3 m/s		+15

22 September, Monday. day, 16°; night, 9°; overcast

23 September, tue

	754 mmHg		78%
	4.9 m/s		+15

23 September, Tuesday. day, 15°; night, 9°; partly cloudy

24 September, wed

	754 mmHg		79%
	5.3 m/s		+15

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

25 September, thu

	754 mmHg		80%
	5.6 m/s		+15

25 September, Thursday. day, 14°; night, 8°; rain

26 September, fri

	754 mmHg		80%
	5.4 m/s		+15

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

27 September, sat

	753 mmHg		80%
	6 m/s		+14

27 September, Saturday. day, 15°; night, 9°; rain

28 September, sun

	753 mmHg		77%
	5.6 m/s		+14

28 September, Sunday. day, 14°; night, 8°; partly cloudy

29 September, mon

	754 mmHg		80%
	5.3 m/s		+14

29 September, Monday. day, 14°; night, 8°; rain

30 September, tue

	753 mmHg		79%
	5.1 m/s		+14

30 September, Tuesday. day, 14°; night, 7°; rain

1 October, wed

	751 mmHg		80%
	5.6 m/s		+14

1 October, Wednesday. day, 13°; night, 8°; clear

2 October, thu

	751 mmHg		79%
	5.3 m/s		+14

2 October, Thursday. day, 14°; night, 7°; rain

3 October, fri

	751 mmHg		82%
	5.6 m/s		+13

3 October, Friday. day, 13°; night, 7°; partly cloudy

4 October, sat

	751 mmHg		81%
	6 m/s		+13

4 October, Saturday. day, 13°; night, 7°; rain

Average data for 10 years

Arendal September

6

sunny days

13

days with precipitation

10

cloudy days

6 sunny days; 13 days with precipitation; 10 cloudy days;

78

%

air humidity

3.8

m/s

WindS

108

mm of precipitation

(10% of annual average)

+16

°C

Water temperature

air humidity 78%; 108 millimeters of precipitation (10% of annual average); Wind southerly 3.8 Meters per second; Water temperature +16°

Weather graphs for September

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

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1

Average data for 10 years

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11

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30

Daytime temperature

Night-time temperature

Cities near you

Oslo
Bergen
Gothenburg
Stavanger
Gjovik
Aarhus
Lillehammer
Geiranger
Odense

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
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 Arendal is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Arendal has 13 rainy, 7 partly cloudy, 6 sunny, and 4 cloudy days in September. The rains are usually heavy.

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