December weather forecast
Papua New Guinea

December in Papua New Guinea marks the peak of the wet season with rainfall reaching its maximum for the year. Despite the significant increase in precipitation, temperatures continue to remain consistent, typically ranging from 25°C (77°F) to 30°C (86°F), reflecting the country's tropical climate.

In coastal regions such as Port Moresby and Lae, the rainfall during December is intense, often resulting in heavy downpours. The increased cloud cover reduces the number of sunshine hours, although the temperature remains relatively high, owing to the tropical climate of the region.

The highlands, including cities like Goroka and Mount Hagen, also experience heavy rainfall during December. Despite the increased precipitation and cloud cover, the nighttime temperatures in these regions are somewhat cooler due to their higher altitudes, providing a counterpoint to the warm daytime temperatures.

Looking ahead to January, the high rainfall trend continues across Papua New Guinea as the wet season persists. The temperatures remain steady within the typical tropical range of 25°C (77°F) to 30°C (86°F), thus continuing the warm and humid conditions that are characteristic of Papua New Guinea's climate.

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• Port Moresby - December »
  In Port Moresby during December, the rain falls for 22.3 days and regularly aggregates up to 106mm (4.17") of precipitation. Port Moresby's warmest month, December, registers temperatures that range from a high of 30.2°C (86.4°F) to a low of 24.5°C (76.1°F).
• Lae - December »
  In December, the average heat index, which factors the actual air temperature with the relative humidity, is evaluated at 30°C (86°F). With an average sea temperature of 30°C (86°F), December is the month with the warmest seawater in Lae.
• Mount Hagen - December »
  The month with the longest days in Mount Hagen is December, with an average of 12h and 30min of daylight. The months with the highest UV index in Mount Hagen are January through May, July through December, with an average maximum UV index of 12.
• Madang - December »
  January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index in Madang, Papua New Guinea. December is the month with the warmest seawater in Madang, with an average sea temperature of 29.9°C (85.8°F).
• Wewak - December »
  The month with the most rainfall in Wewak is December, when the rain falls for 29.2 days and typically aggregates up to 258mm (10.16") of precipitation. The month with the most rainfall in Wewak is December, when the rain falls for 29.2 days and typically aggregates up to 258mm (10.16") of precipitation.
• Goroka - December »
  The months with the most sunshine in Goroka are January, February, June, September through December, with an average of 5h of sunshine. The month with the longest days in Goroka is December, with an average of 12h and 30min of daylight.
• Kokopo - December »
  In Kokopo in December, during 26.8 rainfall days, 172mm (6.77") of precipitation is typically accumulated. November and December, with an average sea temperature of 30.3°C (86.5°F), are months with the warmest seawater in Kokopo.
• Mendi - December »
  December has the longest days of the year in Mendi with an average of 12h and 30min of daylight. With an average of 12h and 30min of daylight, December has the longest days of the year in Mendi, Papua New Guinea.
• Kimbe - December »
  December is the month with the warmest seawater in Kimbe with an average sea temperature of 30.3°C (86.5°F). With an average sea temperature of 30.3°C (86.5°F), December is the month with the warmest seawater in Kimbe, Papua New Guinea.
• Arawa - December »
  In Arawa, in December, during 29.2 rainfall days, 403mm (15.87") of precipitation is typically accumulated. The month with the longest days in Arawa is December, with an average of 12h and 30min of daylight.
• Vanimo - December »
  The month with the most rainfall in Vanimo is December, when the rain falls for 26.8 days and typically aggregates up to 219mm (8.62") of precipitation. With an average of 12h and 18min of daylight, December has the longest days of the year in Vanimo, Papua New Guinea.