September weather forecast
Papua New Guinea

September in Papua New Guinea signifies the beginning of the transition from the dry season to the wet season. The country sees a slight increase in rainfall compared to August, but precipitation levels are still relatively low. Temperatures remain consistent, typically ranging from 25°C (77°F) to 30°C (86°F), in keeping with the country's tropical climate.

In coastal cities such as Port Moresby and Lae, rainfall begins to increase in September, although it remains relatively low compared to the peak rainy season. The decrease in sunshine hours and increase in cloud cover signify the gradual shift towards the wet season.

In the highlands, cities like Goroka and Mount Hagen also start to see a rise in rainfall during September. The nights in these areas remain slightly cooler due to their high altitude, offering a refreshing break from the warm daytime temperatures.

Moving into October, the trend of increasing rainfall continues across Papua New Guinea as the wet season draws nearer. The temperatures stay within the usual range of 25°C (77°F) to 30°C (86°F), upholding the warm conditions typical of Papua New Guinea's tropical climate.

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• Port Moresby - September »
  The months with the lowest UV index in Port Moresby are February, June through September, with an average maximum UV index of 6. In Port Moresby the average seawater temperature in September is 25.9°C (78.6°F).
• Lae - September »
  July through September, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Lae, Papua New Guinea. January through July, September through December, with an average maximum UV index of 6, are months with the highest UV index in Lae, Papua New Guinea.
• Mount Hagen - September »
  In Mount Hagen during September, the rain falls for 23 days and regularly aggregates up to 193mm (7.6") of precipitation. February through September, with an average of 4h of sunshine, are months with the least sunshine in Mount Hagen, Papua New Guinea.
• Madang - September »
  The month with the most sunshine in Madang, Papua New Guinea, is September, with an average of 7.6h of sunshine. In Madang during September, the rain falls for 11 days and regularly aggregates up to 83mm (3.27") of precipitation.
• Wewak - September »
  In Wewak during September, the rain falls for 25.6 days and regularly aggregates up to 136mm (5.35") of precipitation. In Wewak, in September, the average water temperature is 29.2°C (84.6°F).
• Goroka - September »
  On the last day of September, in Goroka sunrise is at 06:04 and sunset at 18:13 +10. In Goroka the average sunshine duration in September is 5h.
• Kokopo - September »
  The month with the least rainfall in Kokopo is September, when the rain falls for 24.4 days and typically collects 109mm (4.29") of precipitation. In Kokopo during September, the rain falls for 24.4 days and regularly aggregates up to 109mm (4.29") of precipitation.
• Mendi - September »
  In September, the average day length in Mendi is 12h and 4min. What time are sunrise and sunset in September in Mendi?
• Kimbe - September »
  In Kimbe, Papua New Guinea, in September, during 25.4 rainfall days, 154mm (6.06") of precipitation is typically accumulated. September is the month with the least rainfall in Kimbe, Papua New Guinea.
• Arawa - September »
  In Arawa, in September, during 29.8 rainfall days, 375mm (14.76") of precipitation is typically accumulated. In Arawa, in September, during 29.8 rainfall days, 375mm (14.76") of precipitation is typically accumulated.
• Vanimo - September »
  In Vanimo, Papua New Guinea, during September, the rain falls for 19.9 days and regularly aggregates up to 61mm (2.4") of precipitation. September and October, with an average relative humidity of 79%, are the least humid months in Vanimo, Papua New Guinea.