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September weather forecast in Wellington

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

	759 mmHg		79%
	10 m/s		+13

31 August, Sunday. day, 11°; night, 10°; clear

1 September, mon

	757 mmHg		81%
	10.6 m/s		+13

1 September, Monday. day, 12°; night, 10°; clear

2 September, tue

	757 mmHg		80%
	10 m/s		+13

2 September, Tuesday. day, 12°; night, 10°; rain

3 September, wed

	757 mmHg		80%
	10.1 m/s		+13

3 September, Wednesday. day, 11°; night, 9°; rain

4 September, thu

	757 mmHg		79%
	11 m/s		+13

4 September, Thursday. day, 12°; night, 10°; overcast

5 September, fri

	756 mmHg		81%
	11.6 m/s		+13

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

6 September, sat

	757 mmHg		79%
	11.2 m/s		+12

6 September, Saturday. day, 12°; night, 10°; partly cloudy

7 September, sun

	756 mmHg		79%
	10.5 m/s		+13

7 September, Sunday. day, 11°; night, 9°; clear

8 September, mon

	757 mmHg		78%
	10.4 m/s		+13

8 September, Monday. day, 11°; night, 9°; clear

9 September, tue

	755 mmHg		78%
	10.7 m/s		+13

9 September, Tuesday. day, 11°; night, 10°; partly cloudy

10 September, wed

	755 mmHg		78%
	10.1 m/s		+13

10 September, Wednesday. day, 12°; night, 10°; partly cloudy

11 September, thu

	756 mmHg		78%
	9.8 m/s		+13

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

12 September, fri

	756 mmHg		79%
	9.89 m/s		+13

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

13 September, sat

	756 mmHg		80%
	11.2 m/s		+13

13 September, Saturday. day, 12°; night, 10°; rain

14 September, sun

	756 mmHg		81%
	10.7 m/s		+13

14 September, Sunday. day, 12°; night, 10°; clear

15 September, mon

	755 mmHg		80%
	11 m/s		+13

15 September, Monday. day, 12°; night, 11°; partly cloudy

16 September, tue

	754 mmHg		81%
	11.7 m/s		+13

16 September, Tuesday. day, 12°; night, 10°; partly cloudy

17 September, wed

	754 mmHg		80%
	11.5 m/s		+13

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

18 September, thu

	754 mmHg		77%
	11 m/s		+12

18 September, Thursday. day, 12°; night, 10°; rain

19 September, fri

	756 mmHg		79%
	10.7 m/s		+13

19 September, Friday. day, 12°; night, 10°; clear

20 September, sat

	756 mmHg		79%
	10.8 m/s		+13

20 September, Saturday. day, 12°; night, 10°; clear

21 September, sun

	756 mmHg		78%
	10.8 m/s		+13

21 September, Sunday. day, 12°; night, 10°; clear

22 September, mon

	756 mmHg		79%
	10.3 m/s		+13

22 September, Monday. day, 12°; night, 10°; clear

23 September, tue

	755 mmHg		83%
	11 m/s		+13

23 September, Tuesday. day, 12°; night, 11°; partly cloudy

24 September, wed

	756 mmHg		81%
	11.7 m/s		+13

24 September, Wednesday. day, 12°; night, 10°; rain

25 September, thu

	756 mmHg		79%
	11.5 m/s		+13

25 September, Thursday. day, 12°; night, 10°; rain

26 September, fri

	756 mmHg		80%
	11.2 m/s		+14

26 September, Friday. day, 12°; night, 11°; rain

27 September, sat

	756 mmHg		79%
	9.5 m/s		+13

27 September, Saturday. day, 12°; night, 10°; overcast

28 September, sun

	756 mmHg		80%
	10.2 m/s		+14

28 September, Sunday. day, 12°; night, 10°; clear

29 September, mon

	755 mmHg		81%
	10.8 m/s		+14

29 September, Monday. day, 13°; night, 10°; rain

30 September, tue

	755 mmHg		81%
	10.7 m/s		+14

30 September, Tuesday. day, 12°; night, 11°; partly cloudy

1 October, wed

	755 mmHg		80%
	11.4 m/s		+14

1 October, Wednesday. day, 13°; night, 11°; clear

2 October, thu

	754 mmHg		81%
	11.9 m/s		+14

2 October, Thursday. day, 13°; night, 11°; rain

3 October, fri

	754 mmHg		80%
	11.5 m/s		+14

3 October, Friday. day, 13°; night, 10°; overcast

4 October, sat

	754 mmHg		80%
	11.9 m/s		+13

4 October, Saturday. day, 12°; night, 11°; rain

Average data for 10 years

Wellington September

9

sunny days

12

days with precipitation

6

cloudy days

9 sunny days; 12 days with precipitation; 6 cloudy days;

80

%

air humidity

7.9

m/s

WindSW

79

mm of precipitation

(9% of annual average)

+13

°C

Water temperature

air humidity 80%; 79 millimeters of precipitation (9% of annual average); Wind south-westerly 7.9 Meters per second; Water temperature +13°

Weather graphs for September

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

W

SW

SW

SW

W

W

SW

SW

SW

SW

SW

W

W

W

W

W

W

W

SW

W

W

SW

W

SW

SW

SW

SW

W

SW

W

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

Christchurch
Akaroa
Palmerston North
Kaikoura
Nelson
Tauranga
Hamilton
Motueka
Taupo

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Cholpon-Ata
Reykyavik
Oslo
Yurmala
Palanga

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

In September, the weather in Wellington is typically warm. Average daily high temperature in September is about 12 degrees above zero. On average, Wellington has 12 rainy, 9 sunny, 7 partly cloudy, and 2 cloudy days in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Wellington.

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