National Capital (Port Moresby)
September
Weather in National Capital for September 2026
Your guide to National Capital weather in September - trends and predictions
Until now, September 2026 in National Capital has been significantly cooler than historical averages by 2 °C, with average temperature of 26.5 °C.
The forecast for the next days in National Capital predicts temperatures to be around 28 °C, close to the historical average.
In general, the average temperature in National Capital at the beginning of September is 28.4 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 28.4 °C by the end of September.
National Capital in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 133.6 mm.
Temperatures
Rain 🌧️
14
Dry days
16
Rainy days
0
Snow days
28°/22°
Temperatures
23 km/h
Avg max wind
81 %
Avg humidity
National Capital Weather September
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Temperatures trend during September in National Capital
See the weather trend as well as the moving average line
September weather in National Capital day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 28° /21° | 0 mm | 7 | |
| 2 Sept. |  Partly cloudy | 28° /21° | 7 mm | 8 | |
| 3 Sept. |  Cloudy | 28° /21° | 1.7 mm | 8 | |
| 4 Sept. | Cloudy | 29° /21° | 0.1 mm | 8 | |
| 5 Sept. | Light rain shower | 28° /21° | 0.6 mm | 6 | |
| 6 Sept. | Patchy rain possible | 29° /22° | 0.9 mm | 6 | |
| 7 Sept. | Patchy rain possible | 29° /22° | 2.4 mm | 7 | |
| 8 Sept. |  Sunny | 29° /21° | 0.1 mm | 8 | |
| 9 Sept. | Light rain shower | 29° /22° | 1.6 mm | 8 | |
| 10 Sept. | Partly cloudy | 28° /21° | 4.3 mm | 8 | |
| 11 Sept. | Patchy rain possible | 28° /22° | 4.5 mm | 7 | |
| 12 Sept. | Light rain shower | 28° /22° | 11.6 mm | 8 | |
| 13 Sept. | Sunny | 27° /21° | 0 mm | 13.6 | |
| 14 Sept. |  Overcast | 27° /21° | 0 mm | 13.3 | |
| 15 Sept. | Overcast | 28° /21° | 0 mm | 13.4 | |
| 16 Sept. | Overcast | 27° /21° | 0 mm | 12.9 | |
| 17 Sept. | Overcast | 27° /21° | 0 mm | 13 | |
| 18 Sept. | Partly cloudy | 28° /21° | 0 mm | 8 | |
| 19 Sept. | Overcast | 28° /22° | 0 mm | 8 | |
| 20 Sept. | Overcast | 27° /21° | 0 mm | 7 | |
| 21 Sept. | Overcast | 28° /22° | 0 mm | 8 | |
| 22 Sept. | Cloudy | 28° /22° | 0 mm | 8 | |
| 23 Sept. | Patchy rain possible | 28° /22° | 0.1 mm | 8 | |
| 24 Sept. | Sunny | 28° /22° | 0 mm | 8 | |
| 25 Sept. | Sunny | 28° /22° | 0 mm | 8 | |
| 26 Sept. | Cloudy | 28° /22° | 0 mm | 7 | |
| 27 Sept. |  Moderate or heavy rain shower | 28° /23° | 8 mm | 7 | |
| 28 Sept. | Light rain shower | 29° /22° | 11.6 mm | 7 | |
| 29 Sept. | Patchy rain possible | 29° /23° | 0.5 mm | 7 | |
| 30 Sept. | Patchy rain possible | 29° /22° | 1.7 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for National Capital 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 National Capital forecast closer to your planned date for the most up-to-date weather information.
Change Month
National Capital in September - FAQ
What are the expected maximum and minimum temperatures in National Capital 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 National Capital during September?
Significant rainfall exceeding 133.6 mm is expected in National Capital during September, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in National Capital during September?
The average wind speed in National Capital during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in National Capital
Explore the daily rainfall trends and prepare for National Capitals September weather 💧
Typically, National Capital has 16 rainy days in September with a total of 133.6 mm of rainfall.
UV exposure in National Capital during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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