Last updated: January 18, 2025
The climate of Manus, Papua New Guinea, is characterized by its classification as Af under the Köppen-Geiger system, indicating a tropical rainforest climate. Year-round, temperatures remain consistently warm, with a minimum of 25°C (77°F) typically recorded in August, an average of 27°C (81°F) throughout the year, and peaking at a maximum of 30°C (86°F) in January. This stable and warm climate supports a rich biodiversity and a vibrant ecosystem, making Manus a unique region for both ecological and anthropological studies.
In Manus, Papua New Guinea, temperature patterns exhibit remarkable consistency throughout the year, characterized by warm tropical conditions. Minimum temperatures remain stable at 25°C (77°F) across all months, while average temperatures hover around 27°C (81°F). The maximum temperature peaks at 30°C (86°F) during the height of the rainy season in January, February, and December, while slightly cooling off to around 29°C (85°F) in the mid-year months from April to November. Notably, the months of October and December see a resurgence of maximum temperatures at 30°C (86°F), indicating minor seasonal fluctuation but overall a predominantly tropical climate that supports a lush environment year-round.
In Lorengau, the climate exhibits a range of temperatures throughout the year, with a minimum of 25°C (77°F) in August and a maximum of 30°C (86°F) in January. For more detailed information on the monthly temperatures, visit monthly temperatures in Lorengau.
Manus, Papua New Guinea, experiences a pronounced wet season, marked by significant rainfall that is both consistent and abundant throughout the year. January initiates the rainy cycle with 178 mm (7.0 in) of precipitation, but this increases sharply in February to 228 mm (9.0 in). The peak occurs in July, where rainfall reaches an impressive 426 mm (16.8 in), demonstrating the region's trend of intensified monsoonal activity. The total annual precipitation reflects a humid tropical climate, essential for supporting the lush biodiversity characteristic of the island.
The number of rainy days further emphasizes Manus's tropical nature, with monthly averages varying between 21 to 29 days of precipitation. March records the highest frequency with 28 rainy days alongside its maximum rainfall of 321 mm (12.6 in), while January has the fewest at 21 days. Despite this variability, rainfall remains prevalent throughout the year, creating a stable, moisture-laden environment that influences both the climate and daily life on the island.
In Manus, Papua New Guinea, sunshine duration exhibits a clear annual trend, with the amount of sunlight gradually increasing as the year progresses. January starts with 236 hours of sunshine, but this figure climbs consistently through the early months, peaking in **May with an impressive 285 hours. This increase signifies a transition into the sunniest half of the year, as the island benefits from prolonged daylight and clearer skies, creating an ideal environment for outdoor activities and vibrant ecosystems.
The summer months, particularly **October, emerge as the peak period for sunshine, accumulating 294 hours of bright daylight, closely followed by August and September. Interestingly, sunshine hours slightly decline in the latter months, with November and December recording 270 hours and 274 hours, respectively. This pattern suggests a seasonal rhythm where the transition from the dry to the wet season begins to influence cloud cover and precipitation, resulting in shorter sunlight durations. Overall, the data highlights Manus's characteristically warm and sunny climate, punctuated by seasonal variations that shape the island's unique environmental and cultural landscape.
The UV Index in Manus, Papua New Guinea, consistently remains at extreme levels throughout the year, reflecting the region's proximity to the equator and its consequent high levels of solar radiation. For the first half of the year, particularly February and March, the Index peaks at 17, indicating a significant risk of harm from unprotected sun exposure within just 10 minutes. Even during the lesser months, such as June and July, the UV Index persists at 12, emphasizing the ongoing need for effective sun protection regardless of the time of year.
As the year progresses, the UV Index shows a slightly declining trend, with values lessening to 14 in May and 14 in August through November. However, the persistent categorization of “extreme” underscores the importance of taking protective measures, such as wearing sunscreen and protective clothing, especially during midday hours. This resilient index reflects Manus's tropical climate, where sun safety is paramount for residents and visitors alike to safeguard against skin damage and heightened UV exposure.
UV Risk Categories
In Manus, Papua New Guinea, daylight duration remains remarkably consistent throughout the year, with a typical span of 12 hours per day from January to May and again from August to November. This uniformity is a hallmark of equatorial regions, where the tilt of the Earth results in minimal variation in daylight hours. These extended daylight periods allow for vibrant ecosystems and a plethora of daily activities, fostering a dynamic environment that supports both natural and human systems.
However, a notable dip occurs in June, where daylight is recorded at 11 hours. This slight reduction interrupts the otherwise stable pattern, yet it transitions seamlessly back to the standard 12-hour duration in July. The consistent daylight in Manus not only influences the local flora and fauna but also shapes cultural practices and daily rhythms, highlighting the significance of solar cycles in the lives of its inhabitants.
Lorengau, Papua New Guinea, experiences a tropical climate characterized by warm temperatures year-round, with average monthly highs ranging from 29°C (85°F) to 30°C (86°F). The region has a distinct wet season, peaking in March with 321 mm (12.6 in) of rainfall, while July is the wettest month with 426 mm (16.8 in). Sunshine is abundant, especially during the dry season, with October boasting the most hours at 294. Overall, Lorengau offers a warm and humid climate influenced by significant precipitation. For further details, visit Lorengau climate.
In conclusion, the climate of Manus, Papua New Guinea, is defined by its warm tropical conditions, abundant rainfall, and consistent sunlight throughout the year. With temperatures typically ranging from 25°C to 30°C, high levels of precipitation, especially during the peak months of February and March, and an extreme UV Index, the region exemplifies the characteristics of a vibrant tropical environment. Additionally, the stable daylight duration contributes to the ecological richness and cultural vibrancy of the island, underpinning the daily lives of its residents. Understanding these climatic factors is essential for sustainable development and effective adaptation strategies in this unique island context.