Last updated: August 31, 2025
December in Port Moresby, Papua New Guinea, brings a warm tropical climate, with maximum temperatures reaching up to 33°C (93°F) and an average of 27°C (81°F). The evenings offer a respite with minimum temperatures settling around 23°C (73°F). This month also witnesses significant rainfall, recording 169 mm (6.7 in) over 22 days, contributing to a high humidity level of 83%. Travelers can expect a lively atmosphere, ideal for experiencing the vibrant culture, despite the frequent showers that characterize this humid season.
In December, Port Moresby experiences a pleasant tropical climate characterized by mild minimum temperatures of 23°C (73°F), allowing for warm and comfortable nights. The days get a little warmer, with average temperatures hovering around 27°C (81°F), ideal for outdoor activities. As the month progresses, the city sees peak temperatures soaring to a sizzling 33°C (91°F). Notably, December reflects a continuation of trends seen in the preceding months, where the temperatures remain relatively stable, with warmth and humidity prominent as the region approaches the end of the year. This consistent warmth makes December a popular time for both locals and visitors to bask in the vibrant beauty of Papua New Guinea's capital.
In December, Port Moresby experiences a significant uptick in precipitation, with 169 mm (6.7 in) of rain spread over approximately 22 days. This marks a continuation of the wet season that began in earnest earlier in the year, reflecting a noticeable increase compared to the drier months of June and July, which recorded only 63 mm (2.5 in) and 45 mm (1.8 in), respectively. While December's rainfall is less than that of March, which peaks at 307 mm (12.1 in), it still contributes to the overall trend of heightened precipitation in the final months of the year. As the year draws to a close, the atmospheric humidity and frequent rainfall can transform the city into a vibrant, lush landscape, showcasing the unique beauty of Port Moresby during the wet season.
December in Port Moresby, Papua New Guinea, continues the trend of high humidity characteristic of the region, with levels sitting at 83%. This modest decrease from the peak of 88% observed in May and June indicates a slight easing as the year draws to a close. Overall, the city's humidity remains relatively consistent, fluctuating gently around the 80s throughout the latter half of the year. Such consistent moisture not only emphasizes the tropical climate but also sets the stage for lush landscapes and vibrant ecosystems, making Port Moresby an intriguing destination year-round.
In December, Port Moresby experiences a UV Index of 15, maintaining its classification as an extreme exposure category. This high UV rating continues a remarkable trend observed throughout the year, where the region consistently records intense UV levels, especially from January to April and from July to November, with a brief dip in May and June. The 10-minute burn time underscores the need for vigilance; even brief sun exposure can be harmful. As the year wraps up, residents and visitors alike should prioritize sun protection to stay safe under the fierce Papua New Guinea sun. For more detailed information, check out the Port Moresby UV Index.
UV Risk Categories
In December, Port Moresby basks in an impressive 297 hours of sunshine, capping off a year that consistently celebrates bright and radiant days. Notably, the city experiences a gradual increase in sunlight hours as the year progresses, with a particularly striking leap from May's 286 hours to December's peak. This upward trend culminates in a cheerful close to the year, showcasing the vibrant essence of the tropics where warmth and light are abundant. The climb from January's 212 hours reflects not just the changing seasons but also the enticing allure of summer, making December a perfect time to revel in the sun-drenched beauty of Papua New Guinea.
In December, Port Moresby experiences a notable dip in sunny weather, with only a 9% chance of sun. This trend marks a significant decline compared to the previous month, November, which boasts a higher likelihood of clear skies at 43%. As the year progresses, the likelihood of sunny days fluctuates considerably, peaking in mid-year months like June and July, where chances soar to 34% and 35%, respectively. Following the sunshine-rich months, December proves to be a rather subdued time for sun seekers, reinforcing the notion that the end of the year tends to bring cloudier and wetter conditions to this vibrant tropical city.
In Port Moresby, Papua New Guinea, the daylight duration exhibits a fascinating rhythm throughout the year. Starting with a consistent 12 hours of daylight from January to March, the city experiences a gradual reduction to 11 hours from April through August. However, as the seasons shift, daylight begins to extend again, returning to 12 hours by September and maintaining that balance through November. December marks the closure of the year with the same generous 12-hour days, creating a beautifully steady span of sunlight that encourages outdoor activities and exploration amidst the tropical climate. This consistency in daylight not only shapes daily life but also enhances the vibrant atmosphere of this coastal city during its festive season.
In December, Port Moresby experiences a gentle breeze, with an average wind speed of 2.2 m/s (5 mph). This marks a continuation of a noticeable decline in wind activity from the previous months, as the city transitions into the warmer season. Notably, this month's wind speeds align closely with those recorded in November, further emphasizing a tranquil close to the year. The trend reveals a distinct shift from the blustery winds of September, which boasted an average of 5.0 m/s (11 mph), showcasing the city’s varied climatic patterns throughout the year. As December settles in, the gentle winds offer a serene backdrop to the festive season, inviting locals and visitors alike to enjoy the outdoor charm of Port Moresby in its calmest moments.
Weather in Port Moresby varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Port Moresby, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between December and January, both months exhibit similar temperature patterns, with minimums around 23°C (73°F), averages of 27°C (81°F), and maximums reaching 33°C (91-93°F). However, January experiences significantly higher precipitation, totaling 276 mm (10.9 in), compared to December's 169 mm (6.7 in), while maintaining the same number of wet days at 22. This increase in rainfall may contribute to a slightly more humid feel, despite both months having consistent humidity levels of 83%. For a more detailed view of January’s weather in Port Moresby, you can visit Port Moresby weather in January.
December and February exhibit quite similar temperature ranges, with both months experiencing minimum temperatures of 23°C (73°F) and average highs around 33°C (93°F in December and 91°F in February). However, February tends to be slightly wetter, with precipitation reaching 200 mm (7.9 in) over 21 days compared to December's 169 mm (6.7 in) over 22 days. Humidity also remains high in both months, with February showing a marginal increase to 84%, while December sits at 83%. For more detailed insights, you can refer to Port Moresby weather in February.
December and March share similar temperature ranges, with minimums hovering around 23°C (73°F), averages at 27°C (81°F), and maximums reaching 33°C (93°F) in December and 32°C (89°F) in March. However, March experiences significantly higher precipitation, with 307 mm (12.1 in) over 28 days, compared to December's 169 mm (6.7 in) over 22 days. Additionally, both months maintain high humidity levels, but March sees a slight increase to 84% compared to December's 83%. For a more detailed comparison, you can refer to the Port Moresby weather in March.
When comparing the weather in December and April, we see that both months feature warm temperatures, but April tends to be slightly cooler on average. December has temperatures ranging from a minimum of 23°C (73°F) to a maximum of 33°C (93°F), while April sees a min of 22°C (72°F) and a max of 31°C (88°F). In terms of precipitation, April is wetter, with 215 mm (8.5 in) falling over 24 days compared to December's 169 mm (6.7 in) over 22 days. Additionally, April has a slightly higher humidity level at 86%, compared to December's 83%. For more detailed insights, you can check out the information on Port Moresby weather in April.
December and May both feature warm temperatures, but December tends to be slightly hotter with an average of 27°C (81°F) compared to May's 26°C (80°F). Additionally, December experiences more rainfall, with 169 mm (6.7 in) over 22 days, while May sees significantly less precipitation at 95 mm (3.8 in) across just 13 days. Humidity levels are also high in both months, but December is slightly lower at 83% compared to May’s 88%. For a closer look at May weather patterns, check out Port Moresby weather in May.
December and June in Port Moresby show distinct differences in weather patterns. In December, temperatures range from a minimum of 23°C (73°F) to a maximum of 33°C (93°F), with an average of 27°C (81°F). The month also experiences significant rainfall, totaling 169 mm (6.7 in) over 22 days, contributing to a high humidity level of 83%. In contrast, June presents slightly cooler weather, with temperatures ranging from 21°C (70°F) to a maximum of 30°C (87°F) and an average of 26°C (79°F). Rainfall is notably less in June, at 63 mm (2.5 in) over just 9 days, while humidity remains high at 88%. For a clearer view of the June weather specifics, you can refer to Port Moresby weather in June.
When comparing the weather in December and July, we observe notable differences in temperatures and precipitation. December typically experiences warmer conditions, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 33°C (93°F), while July has cooler averages, with minimum temperatures of 20°C (69°F) and maximums of 30°C (86°F). Moreover, December is significantly wetter, receiving 169 mm (6.7 in) of precipitation over 22 days, in stark contrast to July's more manageable 45 mm (1.8 in) over just 8 days. Humidity levels are quite high in both months, with December at 83% and July slightly higher at 87%. For more detailed insights on July weather, please refer to Port Moresby weather in July.
In comparing the weather between December and August, December tends to be warmer and wetter. With minimum temperatures around 23°C (73°F) and maximums reaching up to 33°C (93°F), December boasts an average temperature of 27°C (81°F). It also experiences significant rainfall, totaling 169 mm (6.7 in) over 22 days, with humidity levels at around 83%. In contrast, August enjoys slightly cooler averages, with temperatures ranging from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), and a lower precipitation total of 58 mm (2.3 in) over just 10 days, maintaining a humidity level of 85%. For more specifics on August weather, you can check Port Moresby weather in August.
When comparing the weather in December and September, it's evident that December is generally warmer and wetter. In December, temperatures range from a minimum of 23°C (73°F) to a maximum of 33°C (93°F), with an average temperature of 27°C (81°F). The humidity is slightly higher at 83%, and there are about 22 days of rainfall totaling 169 mm (6.7 in). In contrast, September experiences milder conditions, with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 30°C (87°F) and an average of 25°C (78°F). Precipitation is notably lower in September, with 81 mm (3.2 in) of rain over 11 days and humidity at 80%. For more detailed information on September weather, you can visit Port Moresby weather in September.
In comparing the weather between December and October, December tends to be warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 33°C (93°F), while October has slightly cooler averages, with temperatures ranging from 21°C (70°F) to 31°C (88°F). December also experiences higher precipitation levels, totaling 169 mm (6.7 in) over 22 days, compared to October's 119 mm (4.7 in) over 17 days. Humidity is slightly higher in December at 83%, compared to 81% in October, contributing to a more tropical feel during the end of the year. For detailed insights, you can visit Port Moresby weather in October.
December's weather is characterized by slightly warmer temperatures compared to November, with a minimum of 23°C (73°F) and a maximum reaching up to 33°C (93°F), while November features a minimum of 21°C (69°F) and a maximum of 33°C (91°F). Both months maintain an average temperature of around 27°C (81°F). However, December sees a noticeable increase in precipitation, totaling 169 mm (6.7 in) over 22 rainy days, compared to November's 130 mm (5.1 in) over 17 days. Additionally, humidity levels rise slightly in December to 83%, compared to 81% in November. For more details, you can check out Port Moresby weather in November.
As December unfolds in Port Moresby, the city experiences a vibrant blend of warmth and humidity that sets it apart from other months. With maximum temperatures reaching a sweltering 33°C, the average temperature hovers around a comfortable 27°C, while nighttime offers a mild retreat at 23°C. However, the most notable change is the significant rainfall, with 169 mm of precipitation spread over 22 days, creating a lush, tropical atmosphere. The humidity remains high at 83%, making the air feel especially heavy and vibrant. This unique tropical climate invites residents and visitors alike to embrace the lively energy of the season, perfect for festive gatherings. For a deeper understanding of the temperatures and conditions throughout the year, explore the detailed insights on Port Moresby Climate.