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 »
  In Port Moresby during September, the rain falls for 20 days and regularly aggregates up to 82mm (3.23") of precipitation. February, June through September, with an average maximum UV index of 6, are months with the lowest UV index in Port Moresby, Papua New Guinea.
• Lae - September »
  July through September, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater. The months with the coldest seawater are July through September, with an average sea temperature of 28°C (82.4°F).
• Mount Hagen - September »
  The arrival of September in Mount Hagen sees a recorded average high-temperature of a still moderately hot 29°C (84.2°F), showing little divergence from the previous month's conditions. On the first day of September in Mount Hagen sunrise is at 06:22 and sunset at 18:23.
• Madang - September »
  On the first day of September in Madang sunrise is at 06:16 and sunset at 18:17. On the first day of September in Madang sunrise is at 06:16 and sunset at 18:17.
• Wewak - September »
  September's onset in Wewak sees an average high-temperature of a still moderately hot 29.5°C (85.1°F), exhibiting a slight fluctuation from the previous month. In Wewak the average seawater temperature in September is 29.2°C (84.6°F).
• Goroka - September »
  January, February, June, September through December, with an average of 5h of sunshine, are months with the most sunshine in Goroka. In Goroka, in September, it is raining for 20 days, with typically 149mm (5.87") of accumulated precipitation.
• Kokopo - September »
  On the first day of September in Kokopo sunrise is at 05:49 and sunset at 17:51. Kokopo's nighttime average temperature in September drops marginally from the daytime highs, settling at a still warm 25.1°C (77.2°F).
• Mendi - September »
  On the last day of September, in Mendi, sunrise is at 06:10 and sunset at 18:20 +10. Mendi experiences an average nighttime temperature of 12.4°C (54.3°F) in the month of September.
• Kimbe - September »
  In September, in Kimbe the rain falls for 25.4 days. The average high-temperature and low-temperature in Kimbe during September are 29.5°C (85.1°F) and 23.3°C (73.9°F) respectively.
• Arawa - September »
  In Arawa in September, it is raining for 29.8 days, with typically 375mm (14.76") of accumulated precipitation. With an average of 4.4h of sunshine, September has the least sunshine of the year in Arawa, Papua New Guinea.
• Vanimo - September »
  On the first day of September in Vanimo sunrise is at 06:32 and sunset at 18:36. In September, in Vanimo, Papua New Guinea, the rain falls for 19.9 days.