Weather in Port Moresby in December 2025
- December is usually the hottest month of the year in Port Moresby;
Average weather
Average temperature in Port Moresby in December
The temperature in December is +88°F on average, with a range between a maximum of +91°F during the day and a minimum of +73°F at night.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +88°F to +90°F.
Is Port Moresby warm or cold in December?
Port Moresby is typically warm in December.
Maximum temperatures go up compared to the previous month from +86°F to +86°F. The minimum temperature also goes up from +75°F to +75°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
December is the hottest month in Port Moresby, here is the comparison with other months:
Climate in Port Moresby in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +86°F | +86°F | +86°F | ||||
| Min. temperature | ||||||
| +66°F | +68°F | +70°F | ||||
| Max. temperature | ||||||
| +90°F | +93°F | +93°F | ||||
| Rainfall | ||||||
| 96 mm | 164 mm | 227 mm | ||||
| Wind | ||||||
| 2 m/s | 1 m/s | 2 m/s | ||||
| Humidity | ||||||
| 81% | 82% | 82% | ||||
| Air pressure | ||||||
| 1008 HPa | 1007 HPa | 1007 HPa | ||||
| Sunny days | ||||||
| 1 | 0 | 0 | ||||
| Cloudy days | ||||||
| 7 | 3 | 3 | ||||
| Rainy days | ||||||
| 21 | 26 | 27 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as ok as in November. The temperature levels stay the same in the area of +86°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 96 mm to 164 mm. Humidity rises from 81% to 82%. Winds are calmer in comparison to November, going down from 2 m/s to 1 m/s on average. The days becoming less sunny, going from 1 sunny days in November to 0 in December.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Port Moresby is gradually increasing during December, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last December in Port Moresby?
Climate Change Over the Years
The climate in Port Moresby in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1982 (+82°F) and the highest in 2024 (+86°F). The driest year was 1997 with only 892 mm of rainfall, and the wettest year was 2006 with 1873 mm.
FAQ
Is December a good time to visit Port Moresby?
Can you sunbathe in Port Moresby in December?
Is Port Moresby rainy in December?
Is it sunny in Port Moresby in December?
Other cities in Papua New Guinea
Monthly weather in Port Moresby
Source of the data
For this page, we’ve looked at the typical weather in Port Moresby, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
