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September weather forecast in Tønsberg

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

	748 mmHg		77%
	3.4 m/s		+17

31 August, Sunday. day, 17°; night, 9°; partly cloudy

1 September, mon

	749 mmHg		76%
	3.3 m/s		+17

1 September, Monday. day, 18°; night, 9°; partly cloudy

2 September, tue

	748 mmHg		78%
	3.9 m/s		+17

2 September, Tuesday. day, 17°; night, 10°; clear

3 September, wed

	748 mmHg		78%
	3.8 m/s		+17

3 September, Wednesday. day, 17°; night, 9°; clear

4 September, thu

	748 mmHg		79%
	3.8 m/s		+17

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

5 September, fri

	748 mmHg		78%
	3.7 m/s		+17

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

6 September, sat

	748 mmHg		79%
	3.8 m/s		+16

6 September, Saturday. day, 17°; night, 9°; rain

7 September, sun

	747 mmHg		79%
	3.9 m/s		+16

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

8 September, mon

	747 mmHg		78%
	4.19 m/s		+16

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

9 September, tue

	747 mmHg		78%
	4.3 m/s		+16

9 September, Tuesday. day, 17°; night, 10°; rain

10 September, wed

	747 mmHg		79%
	4.19 m/s		+16

10 September, Wednesday. day, 16°; night, 10°; rain

11 September, thu

	746 mmHg		83%
	4.19 m/s		+16

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

12 September, fri

	745 mmHg		79%
	4.19 m/s		+16

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

13 September, sat

	746 mmHg		77%
	4.5 m/s		+16

13 September, Saturday. day, 16°; night, 8°; clear

14 September, sun

	745 mmHg		78%
	4.19 m/s		+16

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

15 September, mon

	745 mmHg		78%
	3.9 m/s		+16

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

16 September, tue

	746 mmHg		78%
	3.8 m/s		+15

16 September, Tuesday. day, 14°; night, 8°; partly cloudy

17 September, wed

	747 mmHg		77%
	3.9 m/s		+15

17 September, Wednesday. day, 15°; night, 8°; clear

18 September, thu

	747 mmHg		79%
	3.8 m/s		+15

18 September, Thursday. day, 15°; night, 8°; partly cloudy

19 September, fri

	748 mmHg		79%
	3.8 m/s		+15

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

20 September, sat

	748 mmHg		81%
	3.8 m/s		+15

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

21 September, sun

	747 mmHg		82%
	3.9 m/s		+15

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

22 September, mon

	747 mmHg		80%
	4.19 m/s		+15

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

23 September, tue

	746 mmHg		81%
	3.9 m/s		+15

23 September, Tuesday. day, 14°; night, 8°; overcast

24 September, wed

	747 mmHg		80%
	4 m/s		+15

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

25 September, thu

	747 mmHg		82%
	4 m/s		+15

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

26 September, fri

	747 mmHg		81%
	4.1 m/s		+15

26 September, Friday. day, 13°; night, 7°; rain

27 September, sat

	746 mmHg		80%
	4.5 m/s		+15

27 September, Saturday. day, 13°; night, 7°; rain

28 September, sun

	746 mmHg		79%
	4.1 m/s		+14

28 September, Sunday. day, 13°; night, 7°; partly cloudy

29 September, mon

	746 mmHg		81%
	4 m/s		+14

29 September, Monday. day, 13°; night, 6°; partly cloudy

30 September, tue

	746 mmHg		81%
	3.7 m/s		+14

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

1 October, wed

	744 mmHg		83%
	4.1 m/s		+14

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

2 October, thu

	744 mmHg		83%
	3.9 m/s		+14

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

3 October, fri

	744 mmHg		84%
	4.4 m/s		+14

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

4 October, sat

	743 mmHg		84%
	4.5 m/s		+14

4 October, Saturday. day, 12°; night, 6°; rain

Average data for 10 years

Tønsberg September

7

sunny days

12

days with precipitation

10

cloudy days

7 sunny days; 12 days with precipitation; 10 cloudy days;

79

%

air humidity

2.7

m/s

WindS

111

mm of precipitation

(10% of annual average)

+16

°C

Water temperature

air humidity 79%; 111 millimeters of precipitation (10% of annual average); Wind southerly 2.7 Meters per second; Water temperature +16°

Weather graphs for September

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

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S

S

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S

S

1

Average data for 10 years

2

3

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30

Daytime temperature

Night-time temperature

Cities near you

Oslo
Gothenburg
Gjovik
Aarhus
Boras
Helsingborg
Herrljunga
Lillehammer
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 Tønsberg is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Tønsberg has 12 rainy, 7 sunny, 7 partly cloudy, and 4 cloudy days in September. The rains are usually heavy. September as well as February, March, April, and May is considered the most uncomfortable time to visit Tønsberg.

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