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September weather forecast in Port Moresby

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

	752 mmHg		83%
	4.3 m/s		+31

31 August, Sunday. day, 28°; night, 23°; rain

1 September, mon

	752 mmHg		81%
	4.4 m/s		+31

1 September, Monday. day, 28°; night, 23°; rain

2 September, tue

	752 mmHg		82%
	4.69 m/s		+31

2 September, Tuesday. day, 28°; night, 23°; overcast

3 September, wed

	752 mmHg		80%
	4.6 m/s		+31

3 September, Wednesday. day, 28°; night, 23°; partly cloudy

4 September, thu

	752 mmHg		79%
	5 m/s		+31

4 September, Thursday. day, 28°; night, 23°; partly cloudy

5 September, fri

	752 mmHg		80%
	4.8 m/s		+30

5 September, Friday. day, 28°; night, 23°; clear

6 September, sat

	752 mmHg		80%
	4.8 m/s		+30

6 September, Saturday. day, 28°; night, 23°; clear

7 September, sun

	752 mmHg		80%
	5 m/s		+30

7 September, Sunday. day, 28°; night, 23°; clear

8 September, mon

	752 mmHg		80%
	4.9 m/s		+31

8 September, Monday. day, 29°; night, 23°; clear

9 September, tue

	752 mmHg		79%
	4.9 m/s		+31

9 September, Tuesday. day, 28°; night, 23°; partly cloudy

10 September, wed

	752 mmHg		80%
	4.69 m/s		+31

10 September, Wednesday. day, 28°; night, 23°; partly cloudy

11 September, thu

	752 mmHg		80%
	4.69 m/s		+31

11 September, Thursday. day, 28°; night, 23°; partly cloudy

12 September, fri

	752 mmHg		80%
	5.1 m/s		+32

12 September, Friday. day, 28°; night, 23°; partly cloudy

13 September, sat

	752 mmHg		81%
	5.2 m/s		+31

13 September, Saturday. day, 28°; night, 23°; overcast

14 September, sun

	752 mmHg		81%
	4.9 m/s		+32

14 September, Sunday. day, 28°; night, 23°; rain

15 September, mon

	752 mmHg		81%
	5 m/s		+31

15 September, Monday. day, 28°; night, 23°; partly cloudy

16 September, tue

	752 mmHg		81%
	4.8 m/s		+31

16 September, Tuesday. day, 28°; night, 23°; rain

17 September, wed

	752 mmHg		81%
	4.69 m/s		+31

17 September, Wednesday. day, 28°; night, 24°; rain

18 September, thu

	752 mmHg		82%
	4.69 m/s		+33

18 September, Thursday. day, 28°; night, 24°; rain

19 September, fri

	752 mmHg		82%
	4.5 m/s		+32

19 September, Friday. day, 28°; night, 24°; rain

20 September, sat

	752 mmHg		82%
	4.6 m/s		+32

20 September, Saturday. day, 28°; night, 24°; rain

21 September, sun

	752 mmHg		82%
	4.6 m/s		+31

21 September, Sunday. day, 28°; night, 24°; rain

22 September, mon

	752 mmHg		82%
	4.6 m/s		+31

22 September, Monday. day, 28°; night, 24°; rain

23 September, tue

	752 mmHg		82%
	4.5 m/s		+31

23 September, Tuesday. day, 28°; night, 24°; rain

24 September, wed

	752 mmHg		82%
	4.5 m/s		+30

24 September, Wednesday. day, 28°; night, 24°; rain

25 September, thu

	752 mmHg		82%
	4.3 m/s		+32

25 September, Thursday. day, 29°; night, 24°; partly cloudy

26 September, fri

	752 mmHg		83%
	4.5 m/s		+32

26 September, Friday. day, 28°; night, 24°; rain

27 September, sat

	752 mmHg		83%
	4.1 m/s		+31

27 September, Saturday. day, 28°; night, 24°; rain

28 September, sun

	752 mmHg		82%
	4.19 m/s		+32

28 September, Sunday. day, 29°; night, 24°; rain

29 September, mon

	752 mmHg		82%
	4.19 m/s		+32

29 September, Monday. day, 29°; night, 24°; rain

30 September, tue

	752 mmHg		82%
	4.5 m/s		+32

30 September, Tuesday. day, 29°; night, 24°; overcast

1 October, wed

	752 mmHg		83%
	4.3 m/s		+31

1 October, Wednesday. day, 28°; night, 24°; overcast

2 October, thu

	752 mmHg		83%
	4.1 m/s		+31

2 October, Thursday. day, 29°; night, 24°; rain

3 October, fri

	752 mmHg		83%
	4.3 m/s		+32

3 October, Friday. day, 29°; night, 24°; rain

4 October, sat

	752 mmHg		82%
	4.3 m/s		+32

4 October, Saturday. day, 29°; night, 24°; overcast

Average data for 10 years

Port Moresby September

4

sunny days

15

days with precipitation

13

cloudy days

4 sunny days; 15 days with precipitation; 13 cloudy days;

81

%

air humidity

3.3

m/s

WindSE

93

mm of precipitation

(5% of annual average)

+31

°C

Water temperature

air humidity 81%; 93 millimeters of precipitation (5% of annual average); Wind south-easterly 3.3 Meters per second; Water temperature +31°

Weather graphs for September

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

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SE

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SE

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SE

S

S

S

1

Average data for 10 years

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3

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5

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10

11

12

13

14

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30

Daytime temperature

Night-time temperature

Cities near you

Alotau
Port Douglas
Mount-Hagen
Kerema
Tufi
Lae
Gurney Airport
Salamo
Goroka

Cities with similar weather in September

Phuket
Tel Aviv
Aqaba
Goa
Eylat
Male
Haifa
Netanya
Colombo

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

In September, the weather in Port Moresby is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Port Moresby has 15 rainy, 8 partly cloudy, 4 sunny, and 3 cloudy days in September. The rains are usually heavy.

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