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Weather in Port Moresby for September 2025

Your guide to Port Moresby weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Port Moresby has been nearly identical to the historical average, with a temperature of 28.2 °C (showing only a slight deviation of -0.3 °C).

  • The forecast for the next days in Port Moresby predicts temperatures to be around 28 °C, close to the historical average.

  • In general, the average temperature in Port Moresby at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.3 °C by the end of September.

    • Rain 🌧️

  • Port Moresby in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 78.7 mm.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/22°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Port Moresby Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
28°
2
Partly cloudy
28°
3
Cloudy
29°
4
Cloudy
29°
5
Light rain shower
28°
6
Patchy rain possible
29°
7
Light rain shower
29°
8
Patchy rain possible
30°
9
Light rain shower
29°
10
Light rain shower
29°
11
Patchy rain possible
28°
12
Light rain shower
28°
13
Overcast
27°
14
Light rain shower
28°
15
Cloudy
28°
16
Patchy rain possible
28°
17
Patchy rain possible
29°
18
Patchy rain possible
29°
19
Patchy rain possible
29°
20
Patchy rain possible
29°
21
Heavy rain
27°
22
Moderate rain
27°
23
Patchy rain possible
27°
24
Patchy rain possible
27°
25
Patchy rain possible
27°
26
Patchy rain possible
28°
27
Patchy rain possible
26°
28
Patchy rain possible
27°
29
Patchy rain possible
27°
30
Patchy rain possible
29°

Temperatures trend during September in Port Moresby

See the weather trend as well as the moving average line

September weather in Port Moresby day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 28° /21° 0 mm 7
2 Sept. Partly cloudy
Partly cloudy
 28° /21° 9.3 mm 7
3 Sept. Cloudy
Cloudy
 29° /21° 2.2 mm 7
4 Sept. Cloudy
Cloudy
 29° /22° 0.1 mm 7
5 Sept. Light rain shower
Light rain shower
 28° /22° 0.7 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 29° /22° 1.1 mm 7
7 Sept. Light rain shower
Light rain shower
 29° /22° 3.2 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /22° 0.1 mm 7
9 Sept. Light rain shower
Light rain shower
 29° /22° 2.1 mm 7
10 Sept. Light rain shower
Light rain shower
 29° /22° 5.8 mm 7
11 Sept. Patchy rain possible
Patchy rain possible
 28° /22° 6 mm 7
12 Sept. Light rain shower
Light rain shower
 28° /22° 15.5 mm 7
13 Sept. Overcast
Overcast
 27° /22° 6.5 mm 7
14 Sept. Light rain shower
Light rain shower
 28° /22° 6 mm 7
15 Sept. Cloudy
Cloudy
 28° /22° 0.7 mm 7
16 Sept. Patchy rain possible
Patchy rain possible
 28° /23° 0.4 mm 3.2
17 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 0.2 mm 3.2
18 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 4.4 mm 3.1
19 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 3.1 mm 3.1
20 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 4.8 mm 3.3
21 Sept. Heavy rain
Heavy rain
 27° /23° 32.1 mm 6
22 Sept. Moderate rain
Moderate rain
 27° /23° 13.5 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 27° /24° 2.2 mm 7
24 Sept. Patchy rain possible
Patchy rain possible
 27° /24° 1.8 mm 7
25 Sept. Patchy rain possible
Patchy rain possible
 27° /24° 0.3 mm 7
26 Sept. Patchy rain possible
Patchy rain possible
 28° /24° 0.3 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
 26° /23° 0.5 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 0.4 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 0.2 mm 7
30 Sept. Patchy rain possible
Patchy rain possible
 29° /22° 1.1 mm 7
Next
Important Notice
Our weather forecast for Port Moresby in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Port Moresby forecast closer to your planned date for the most up-to-date weather information.
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Port Moresby in September - FAQ

What are the expected maximum and minimum temperatures in Port Moresby during September?
During September, expect a variety of temperatures with highs around 28° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Port Moresby during September?
Moderate rainfall is anticipated in Port Moresby during September, with a total of 78.7 mm spread over approximately 20 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Port Moresby during September?
The average wind speed in Port Moresby during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Port Moresby

Explore the daily rainfall trends and prepare for Port Moresbys September weather 💧

UV exposure in Port Moresby during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Port Moresby?

Get accurate weather forecasts for Port Moresby, located at latitude -9.477 and longitude 147.151. Stay updated with localized weather information tailored for Port Moresby.

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