Port Moresby
Papua New Guinea
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Port Moresby, Papua New Guinea

The mountains and beautiful clear waters surrounding the beautiful Port Moresby, in Papua New Guinea
The mountains and beautiful clear waters surrounding the beautiful Port Moresby, in Papua New Guinea
The first month of the spring, September, is also a hot month in Port Moresby, Papua New Guinea, with temperature in the range of an average high of 31°C (87.8°F) and an average low of 23.2°C (73.8°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still tropical 31°C (87.8°F). The average low-temperature, in Port Moresby, Papua New Guinea, is 23.2°C (73.8°F).

Humidity

In Port Moresby, Papua New Guinea, the average relative humidity is 76%.

Rainfall

In Port Moresby, in September, during 5 rainfall days, 14.4mm (0.6") of precipitation is typically accumulated. Throughout the year, there are 114 rainfall days, and 898.8mm (35.4") of precipitation is accumulated.

Sea temperature

In Port Moresby, the average seawater temperature is 25.9°C (78.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day is 12.1h.

Sunshine

In September, the average sunshine in Port Moresby is 7.1h.

UV index

Months with the highest UV index in Port Moresby are January through April, August through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from unsafe exposure to the UV radiation for ordinary individuals.
The daily maximum UV index of 12 interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Port Moresby?

The average high-temperature, in September, in Port Moresby, Papua New Guinea, is 31°C (87.8°F), while the average low-temperature is 23.2°C (73.8°F).

What is the average humidity in September in Port Moresby?

In September, the average relative humidity in Port Moresby is 76%.

How many days does it rain in September in Port Moresby?

In September, in Port Moresby, the rain falls for 5 days. Throughout September, 14.4mm (0.6") of precipitation is accumulated.

What is the sea water temperature in September in Port Moresby?

In Port Moresby, the average seawater temperature in September is 25.9°C (78.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Port Moresby have in September?

In Port Moresby, Papua New Guinea, the average length of the day in September is 12.1h.

How many hours of sunshine does Port Moresby have in September?

In September, the average sunshine is 7.1h.

What is the month with the highest UV index in Port Moresby?

Months with the highest UV index are January through April, August through December, with an average maximum UV index of 12.

How high is the UV index in September in Port Moresby?

In September, the average daily maximum UV index is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unprotected exposure to the UV radiation.
Average temperature in September - Port Moresby, Papua New Guinea
  • Average high temperature in September: 31°C

The warmest month (with the highest average high temperature) is November (32.5°C).
The month with the lowest average high temperature is July (29.9°C).

  • Average low temperature in September: 23.2°C

Months with the highest average low temperature are January and December (23.7°C).
The coldest month (with the lowest average low temperature) is July (22.4°C).

Average humidity in September - Port Moresby, Papua New Guinea
  • Average humidity in September: 76%

The month with the highest relative humidity is April (82%).
The month with the lowest relative humidity is November (75%).

Average rainfall in September - Port Moresby, Papua New Guinea
  • Average rainfall in September: 14.4mm

The wettest month (with the highest rainfall) is January (192.2mm).
The driest month (with the lowest rainfall) is August (12mm).

Average rainfall days in September - Port Moresby, Papua New Guinea
  • Average rainfall days in September: 5 days

Months with the highest number of rainy days are January and March (18 days).
Months with the lowest number of rainy days are July and August (4 days).

Average sea temperature in September - Port Moresby, Papua New Guinea
  • Average sea temperature in September: 25.9°C

The best month for swimming (with the highest average sea temperature) is January (29.7°C).
The coldest month (with the lowest average sea temperature) is August (25.6°C).

Average daylight in September / Average sunshine in September - Port Moresby, Papua New Guinea
  • Average daylight in September: 12.1h

The month with the longest days is December (Average daylight: 12.7h).
Months with shortest days are June and July (Average daylight: 11.6h).

  • Average sunshine in September: 7.1h

The month with most sunshine is November (Average sunshine: 8.1h).
The month with least sunshine is February (Average sunshine: 5.6h).

Average UV index in September - Port Moresby, Papua New Guinea
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 9).