September weather forecast
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

Weather in September

The first month of the spring, September, is still a warm month in Port Moresby, Papua New Guinea, with temperature in the range of an average low of 22.7°C (72.9°F) and an average high of 28°C (82.4°F).

Temperature

In Port Moresby, Papua New Guinea, the average high-temperature in September is relatively the same as in August - a still moderately hot 28°C (82.4°F). In September, in Port Moresby, the average low-temperature is 22.7°C (72.9°F).

Heat index

The average heat index in September is appraised at a hot 31.8°C (89.2°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Port Moresby, the average relative humidity in September is 78%.

Rainfall

In September, in Port Moresby, Papua New Guinea, the rain falls for 20 days. Throughout September, 82mm (3.23") of precipitation is accumulated. In Port Moresby, during the entire year, the rain falls for 249.8 days and collects up to 1311mm (51.61") of precipitation.

Sea temperature

In Port Moresby, the average water temperature is 25.9°C (78.6°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In September, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 06:13 and sunset at 18:09. On the last day of September, sunrise is at 05:56 and sunset at 18:06 +10.

Sunshine

In September, the average sunshine is 9.3h.

UV index

The months with the lowest UV index are February, June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in Port Moresby?

In September, the average high-temperature is 28°C (82.4°F), and the average low-temperature is 22.7°C (72.9°F). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 31.8°C (89.2°F).

What is the average humidity in September in Port Moresby?

In September, the average relative humidity is 78%.

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

In Port Moresby, in September, it is raining for 20 days, with typically 82mm (3.23") of accumulated precipitation.

How warm is the water in September in Port Moresby?

In September, the average sea temperature is 25.9°C (78.6°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Port Moresby?

The average day length in September in Port Moresby, Papua New Guinea, is 12h and 3min.

When are sunrise and sunset in September in Port Moresby?

On the first day of September, sunrise is at 06:13 and sunset at 18:09. On the last day of the month, sunrise is at 05:56 and sunset at 18:06 +10.

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

The average sunshine duration in September in Port Moresby, Papua New Guinea, is 9.3h.

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

February, June through September, with an average maximum UV index of 6, are months with the lowest UV index.

What is the UV index intensity in September in Port Moresby?

In September, the average daily maximum UV index in Port Moresby is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in September
Port Moresby, Papua New Guinea

Average temperature in September - Port Moresby, Papua New Guinea
  • Average high temperature in September: 28°C

The warmest month (with the highest average high temperature) is December (30.2°C).
The months with the lowest average high temperature are July and August (27.6°C).

  • Average low temperature in September: 22.7°C

The month with the highest average low temperature is December (24.5°C).
The coldest month (with the lowest average low temperature) is August (22.5°C).

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Average pressure in September
Port Moresby, Papua New Guinea

Average pressure in September - Port Moresby, Papua New Guinea
  • Average pressure in September: 1011.6mbar

The month with the highest atmospheric pressure is August (1012.1mbar).
The month with the lowest atmospheric pressure is January (1007.9mbar).

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Average wind speed in September
Port Moresby, Papua New Guinea

Average wind speed in September - Port Moresby, Papua New Guinea
  • Average wind speed in September: 17.2km/h

The windiest month (with the highest average wind speed) is July (18.9km/h).
The calmest month (with the lowest average wind speed) is December (9.7km/h).

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Average humidity in September
Port Moresby, Papua New Guinea

Average humidity in September - Port Moresby, Papua New Guinea
  • Average humidity in September: 78%

The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January and February (73%).

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Average rainfall in September
Port Moresby, Papua New Guinea

Average rainfall in September - Port Moresby, Papua New Guinea
  • Average rainfall in September: 82mm

The wettest month (with the highest rainfall) is March (203mm).
The driest month (with the least rainfall) is July (46mm).

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Average rainfall days in September
Port Moresby, Papua New Guinea

Average rainfall days in September - Port Moresby, Papua New Guinea
  • Average rainfall days in September: 20 days

The month with the highest number of rainy days is March (24.6 days).
The month with the least rainy days is July (14.7 days).

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Average sea temperature in September
Port Moresby, Papua New Guinea

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).

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Average daylight in September /
Average sunshine in September
Port Moresby, Papua New Guinea

Average daylight in September / Average sunshine in September - Port Moresby, Papua New Guinea
  • Average daylight in September: 12h and 3min

The month with the longest days is December (Average daylight: 12h and 40min).
The month with the shortest days is June (Average daylight: 11h and 35min).

  • Average sunshine in September: 9.3h

The month with the most sunshine is November (Average sunshine: 11.3h).
The month with the least sunshine is May (Average sunshine: 7.1h).

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Average sunshine days in September
Port Moresby, Papua New Guinea

Average sunshine days in September - Port Moresby, Papua New Guinea
  • Average sunshine days in September: 7.9 days

The month with the most sunshine days is July (13.4 days).
The months with the least sunshine days are March and April (5.2 days).

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Average UV index in September
Port Moresby, Papua New Guinea

Average UV index in September - Port Moresby, Papua New Guinea
  • Average UV index in September: 6

The months with the highest UV index are January, March, April, May, October, November and December (UV index 7).
The months with the lowest UV index are February, June, July, August and September (UV index 6).

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Average cloud cover in September
Port Moresby, Papua New Guinea

Average cloud cover in September - Port Moresby, Papua New Guinea
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is November (Cloud cover 28).

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Average visibility in September
Port Moresby, Papua New Guinea

Average visibility in September - Port Moresby, Papua New Guinea
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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