National Capital (Port Moresby)
September
Weather in National Capital for September 2025
Your guide to National Capital weather in September - trends and predictions
In general, the average temperature in National Capital at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 28.7 °C by the end of September.
The climate of National Capital in September is notably wet, with an average of 14 rainy days.
Is September a good time to visit National Capital? check out the best time to travel to National Capital page.
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16
Dry days
14
Rainy days
0
Snow days
28°/22°
Temperatures
25 km/h
Avg max wind
78 %
Avg humidity
National Capital in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2  28° | 3  29° | 4 29° | 5  28° | 6 29° | 7 29° |
| 8 29° | 9 29° | 10 29° | 11 29° | 12 28° | 13  27° | 14 28° |
| 15 28° | 16 27° | 17 26° | 18 29° | 19 28° | 20 29° | 21 30° |
| 22 29° | 23 28° | 24 29° | 25 28° | 26 29° | 27 28° | 28 29° |
| 29 29° | 30 29° |
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Temperatures trend during September in National Capital
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 28° /21° | 0 mm | 7 | |
| 2 Sept. | Partly cloudy | 28° /21° | 13.5 mm | 7 | |
| 3 Sept. | Cloudy | 29° /21° | 2.9 mm | 7 | |
| 4 Sept. | Cloudy | 29° /22° | 0.1 mm | 7 | |
| 5 Sept. | Light rain shower | 28° /22° | 0.6 mm | 7 | |
| 6 Sept. | Patchy rain possible | 29° /22° | 1.5 mm | 7 | |
| 7 Sept. | Light rain shower | 29° /22° | 4.8 mm | 7 | |
| 8 Sept. | Patchy rain possible | 29° /22° | 0.2 mm | 7 | |
| 9 Sept. | Light rain shower | 29° /22° | 3.1 mm | 7 | |
| 10 Sept. | Light rain shower | 29° /22° | 8.1 mm | 7 | |
| 11 Sept. | Patchy rain possible | 29° /22° | 1.1 mm | 7 | |
| 12 Sept. | Partly cloudy | 28° /22° | 0.5 mm | 7 | |
| 13 Sept. | Overcast | 27° /22° | 1.5 mm | 7 | |
| 14 Sept. | Partly cloudy | 28° /22° | 4.2 mm | 7 | |
| 15 Sept. | Cloudy | 28° /22° | 0.7 mm | 7 | |
| 16 Sept. | Partly cloudy | 27° /21° | 2.4 mm | 7 | |
| 17 Sept. | Partly cloudy | 26° /21° | 2 mm | 7 | |
| 18 Sept. | Cloudy | 29° /21° | 0 mm | 7 | |
| 19 Sept. | Cloudy | 28° /22° | 0.3 mm | 7 | |
| 20 Sept. | Light rain shower | 29° /23° | 2.3 mm | 7 | |
| 21 Sept. | Patchy rain possible | 30° /23° | 5.7 mm | 7 | |
| 22 Sept. | Patchy rain possible | 29° /23° | 1 mm | 7 | |
| 23 Sept. | Light rain shower | 28° /23° | 1.1 mm | 7 | |
| 24 Sept. | Light rain shower | 29° /23° | 0.7 mm | 7 | |
| 25 Sept. | Light rain shower | 28° /22° | 2.5 mm | 7 | |
| 26 Sept. | Light rain shower | 29° /23° | 6.4 mm | 7 | |
| 27 Sept. | Light rain shower | 28° /23° | 8.5 mm | 7 | |
| 28 Sept. | Light rain shower | 29° /22° | 1.4 mm | 7 | |
| 29 Sept. | Partly cloudy | 29° /23° | 0.4 mm | 7 | |
| 30 Sept. | Patchy rain possible | 29° /22° | 1.1 mm | 7 | |
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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.
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?
Moderate rainfall is anticipated in National Capital during September, with a total of 55.5 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in National Capital during September?
The average wind speed in National Capital during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to National Capital in September?
As you prepare for your trip to National Capital in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in National Capital, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in National Capital
Explore the daily rainfall trends and prepare for National Capitals September weather 💧
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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