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September weather forecast in Sydney

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

	757 mmHg		79%
	6.8 m/s		+18

31 August, Sunday. day, 20°; night, 15°; clear

1 September, mon

	757 mmHg		80%
	6.3 m/s		+18

1 September, Monday. day, 20°; night, 15°; rain

2 September, tue

	759 mmHg		79%
	6 m/s		+18

2 September, Tuesday. day, 19°; night, 14°; clear

3 September, wed

	759 mmHg		80%
	6.2 m/s		+18

3 September, Wednesday. day, 20°; night, 14°; clear

4 September, thu

	758 mmHg		81%
	6.2 m/s		+18

4 September, Thursday. day, 19°; night, 15°; rain

5 September, fri

	758 mmHg		80%
	6.6 m/s		+18

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

6 September, sat

	759 mmHg		77%
	6.5 m/s		+18

6 September, Saturday. day, 19°; night, 14°; clear

7 September, sun

	758 mmHg		79%
	6.8 m/s		+18

7 September, Sunday. day, 20°; night, 14°; partly cloudy

8 September, mon

	757 mmHg		80%
	6.6 m/s		+17

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

9 September, tue

	759 mmHg		80%
	5.8 m/s		+17

9 September, Tuesday. day, 19°; night, 15°; partly cloudy

10 September, wed

	758 mmHg		81%
	6.4 m/s		+17

10 September, Wednesday. day, 19°; night, 14°; rain

11 September, thu

	759 mmHg		80%
	7.1 m/s		+17

11 September, Thursday. day, 18°; night, 14°; rain

12 September, fri

	758 mmHg		79%
	7 m/s		+17

12 September, Friday. day, 18°; night, 14°; partly cloudy

13 September, sat

	759 mmHg		77%
	6.2 m/s		+17

13 September, Saturday. day, 18°; night, 13°; clear

14 September, sun

	759 mmHg		81%
	6.1 m/s		+17

14 September, Sunday. day, 19°; night, 14°; partly cloudy

15 September, mon

	759 mmHg		80%
	6.6 m/s		+16

15 September, Monday. day, 19°; night, 14°; partly cloudy

16 September, tue

	758 mmHg		80%
	6.7 m/s		+17

16 September, Tuesday. day, 18°; night, 14°; rain

17 September, wed

	759 mmHg		77%
	6.9 m/s		+17

17 September, Wednesday. day, 18°; night, 12°; clear

18 September, thu

	758 mmHg		80%
	6.4 m/s		+16

18 September, Thursday. day, 17°; night, 13°; rain

19 September, fri

	760 mmHg		79%
	6.9 m/s		+16

19 September, Friday. day, 17°; night, 12°; rain

20 September, sat

	760 mmHg		79%
	7.1 m/s		+16

20 September, Saturday. day, 16°; night, 12°; overcast

21 September, sun

	759 mmHg		79%
	6.7 m/s		+16

21 September, Sunday. day, 17°; night, 12°; partly cloudy

22 September, mon

	759 mmHg		79%
	6.9 m/s		+16

22 September, Monday. day, 18°; night, 13°; clear

23 September, tue

	757 mmHg		81%
	7.3 m/s		+16

23 September, Tuesday. day, 17°; night, 13°; rain

24 September, wed

	757 mmHg		79%
	7.2 m/s		+16

24 September, Wednesday. day, 15°; night, 12°; overcast

25 September, thu

	760 mmHg		76%
	6.4 m/s		+15

25 September, Thursday. day, 15°; night, 11°; partly cloudy

26 September, fri

	760 mmHg		79%
	6.5 m/s		+15

26 September, Friday. day, 16°; night, 11°; overcast

27 September, sat

	759 mmHg		82%
	6.5 m/s		+15

27 September, Saturday. day, 16°; night, 12°; rain

28 September, sun

	759 mmHg		81%
	7 m/s		+15

28 September, Sunday. day, 17°; night, 11°; rain

29 September, mon

	759 mmHg		80%
	7.5 m/s		+15

29 September, Monday. day, 16°; night, 12°; overcast

30 September, tue

	760 mmHg		79%
	7 m/s		+15

30 September, Tuesday. day, 16°; night, 12°; clear

1 October, wed

	760 mmHg		81%
	6.5 m/s		+15

1 October, Wednesday. day, 16°; night, 11°; clear

2 October, thu

	758 mmHg		82%
	6.3 m/s		+15

2 October, Thursday. day, 15°; night, 11°; clear

3 October, fri

	759 mmHg		78%
	6.9 m/s		+15

3 October, Friday. day, 14°; night, 11°; clear

4 October, sat

	761 mmHg		75%
	6.5 m/s		+15

4 October, Saturday. day, 14°; night, 10°; clear

Average data for 10 years

Sydney September

7

sunny days

11

days with precipitation

9

cloudy days

7 sunny days; 11 days with precipitation; 9 cloudy days;

79

%

air humidity

4.69

m/s

WindSW

109

mm of precipitation

(8% of annual average)

+17

°C

Water temperature

air humidity 79%; 109 millimeters of precipitation (8% of annual average); Wind south-westerly 4.69 Meters per second; Water temperature +17°

Weather graphs for September

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

SW

SW

SW

S

SW

SW

SW

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

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18

19

20

21

22

23

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27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Saint John
Halifax
Liverpool
New Glasgow
Deer Lake
Bridgewater
Bonaventure
Iles de la Madeleine
Charlottetown

Cities with similar weather in September

Riga
Stockholm
Yurmala
Palanga
Copenhagen
Capetown
Gdansk
Looe
Klaipeda

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

In September, the weather in Sydney is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Sydney has 11 rainy, 8 partly cloudy, 7 sunny, and 4 cloudy days in September. The rains are usually heavy.

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