Last updated: August 31, 2025
In September, Mount Hagen, Papua New Guinea, experiences a mild climate characterized by a maximum temperature of 25°C (77°F) and an average of 17°C (63°F), dipping to a cooler 10°C (51°F) at night. This month marks a transitional period marked by significant precipitation, averaging 256 mm (10.1 in) over 24 days, contributing to the region's lush landscapes. High humidity levels at 85% create a vibrant environment, perfect for exploring the rich biodiversity and cultural heritage that Mount Hagen has to offer. Visitors can expect an invigorating blend of vibrant weather and lush scenery, making this a unique time to experience the region.
In September, Mount Hagen, Papua New Guinea, continues to showcase its temperate climate with minimum temperatures hovering around 10°C (51°F), while the average remains a comfortable 17°C (63°F). As the month progresses, highs reach up to 25°C (77°F), providing a pleasant escape from the cooler winter months of June and July. This slight increase in temperature reflects a gradual warming trend as the region transitions into spring, with conditions remaining stable and inviting for visitors and locals alike. Overall, September maintains the consistent, mild weather pattern characteristic of Mount Hagen, making it an attractive time to explore the vibrant culture and stunning landscapes of the highlands.
In September, Mount Hagen experiences an increase in precipitation, with 256 mm (10.1 in) of rain falling over 24 days. This month reflects a noticeable uptick following the drier months of June and August, highlighting a transition towards the wetter season characteristic of the region. With rainfall more consistent than in the preceding months, the lush landscapes and vibrant biodiversity that Papua New Guinea is known for begin to flourish once again. As temperatures moderate and the air thickens with humidity, September serves as a harbinger of the intensifying rains ahead, setting the stage for the year’s final quarter where precipitation levels peak before a gradual decline into the new year.
In September, Mount Hagen experiences a slight dip in humidity, averaging 85%—the lowest level of the year. This decrease follows a pattern that begins in July, where humidity levels start to gradually decline from 86%. As the region transitions from the cooler mid-year months into the warmer later months, humidity inches back up, peaking again in November at 90%. Overall, the data highlights a generally high humidity trend for the city, with 89% being the typical norm from January to April, before tapering off slightly during the middle of the year. This creates a unique tropical climate that characterizes Mount Hagen throughout the year.
In September, Mount Hagen experiences a UV Index of 16, placing it in the extreme exposure category, with a recommended burn time of just 10 minutes. This high level of UV radiation follows a consistent pattern observed throughout the year, where from January to April, the index peaks at values between 16 and 18, before gradually decreasing in May and June. However, even as the index fluctuates, it remains formidable, seldom dropping below 12 during the winter months. As such, residents and visitors alike should take necessary precautions to protect their skin when enjoying the vibrant outdoor activities that this beautiful region has to offer. For more detailed information, check out the Mount Hagen UV Index.
UV Risk Categories
As September unfolds in Mount Hagen, Papua New Guinea, the region enjoys a delightful 238 hours of sunshine, a slight dip from the previous month’s record high of 259 hours in August. This transition marks the tail end of the dry season, where sunny days reached their peak during the mid-year months. The sun's embrace remains generous, creating a warm atmosphere that invites both locals and visitors to revel in the natural beauty of the area. Following September, the daylight hours remain steady, with October promising 242 hours of light, suggesting that while the days may be gradually shortening, Mount Hagen continues to bask in ample sunshine—benefiting agriculture and outdoor activities alike as the year draws to a close.
In Mount Hagen, Papua New Guinea, the chance of sunny weather in September hovers around 15%, marking a moderate point in the annual trend. As the dry season approaches, this month contrasts with the earlier months of the year, where the likelihood of sunshine was notably low. For instance, from January to May, sunny days dipped below 10%, but began to improve significantly with the onset of June, hitting a peak of 26%. Following that high, September's prospects for sun represent a slight decline, yet still remain robust compared to the preceding months. This pattern suggests that while September may not offer the brightest days, it emerges as a transitional month where the promise of clearer skies begins to take shape, particularly when viewed against the gloom of early-year averages. Overall, autumn in Mount Hagen beckons with a mixture of sunshine and tropical richness.
As September rolls into Mount Hagen, Papua New Guinea, daylight begins to gradually transition back to a longer duration, marking a refreshing shift after several months of shorter days. With 12 hours of daylight, the month signals a return to the stable and consistent brightness that characterizes the earlier part of the year. Following a stretch of 11-hour days from April to August, this re-emerging balance of sunlight invites both locals and visitors alike to enjoy the vibrant landscapes and rich biodiversity. As autumn approaches, the rhythm of day and night continues to stabilize, ensuring that Mount Hagen basks in the warm embrace of daylight for most of the year.
In September, the winds in Mount Hagen, Papua New Guinea, maintain a gentle allure with an average speed of 1.2 m/s (about 3 mph), echoing the patterns established throughout the preceding months. Notably, this month reflects a consistency that has characterized the region since April, where winds have lingered around the same brisk speed, creating a mild yet refreshing atmosphere. As we transition into the following months, this steadfast wind speed of 1.2 m/s continues into October and November, suggesting an enduring rhythm in the landscape's breezes. This stability not only offers a sense of comfort but also hints at the delicate balance of the region's tropical climate, inviting both locals and visitors to bask in the serene yet invigorating air.
Weather in Mount Hagen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mount Hagen, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit notable differences in weather patterns. September experiences mild temperatures, with a minimum of 10°C and an average of 17°C, while January sees slightly warmer conditions, with an average of 18°C and a maximum of 27°C. Precipitation levels are significantly higher in January, accumulating 485 mm over 23 days, compared to September's 256 mm over 24 days. Additionally, humidity rises slightly in January to 89%, compared to 85% in September. For more detailed insights into January's weather, you can visit Mount Hagen weather in January.
In comparing the weather between September and February, both months feature mild temperatures, with September typically ranging from a minimum of 10°C (51°F) to a maximum of 25°C (77°F), averaging around 17°C (63°F). In contrast, February sees slightly warmer temperatures, with a minimum of 11°C (53°F) and a maximum of 26°C (79°F), averaging 18°C (65°F). However, February experiences significantly higher precipitation, totaling 528 mm (20.8 in) over 27 days, compared to September's 256 mm (10.1 in) over 24 days. Humidity levels also increase slightly in February, reaching 89% compared to September's 85%. For more specifics on February weather, you can visit Mount Hagen weather in February.
When comparing the weather in September and March, both months display similar temperature ranges, with September seeing a minimum of 10°C and a maximum of 25°C, while March has a slightly higher minimum of 11°C and an identical maximum. However, March experiences significantly more rainfall, with an average of 548 mm compared to September's 256 mm, and it also has more rainy days (30 days in March versus 24 days in September). Humidity levels are higher in March at 89%, compared to 85% in September. For more detailed weather information, check out Mount Hagen weather in March.
When comparing the weather in September and April, both months feature similar maximum temperatures, peaking at around 25°C (77°F). However, September has a slightly lower average temperature of 17°C (63°F) compared to April's 18°C (64°F). Precipitation levels are notably higher in April, with 515 mm (20.3 in) of rain over 28 days, while September sees only 256 mm (10.1 in) across 24 days. Additionally, April is characterized by a marginally higher humidity level of 89%, compared to September's 85%. For more detailed information, you can check Mount Hagen weather in April.
In comparing the weather of September and May, both months experience mild temperatures with highs reaching around 25°C (77°F). However, September features slightly cooler averages with a minimum of 10°C (51°F) and an average of 17°C (63°F), compared to May’s minimum of 11°C (52°F) and average of 18°C (64°F). Precipitation levels are notably high in both months, with September receiving 256 mm (10.1 in) across 24 days, while May sees even higher precipitation at 287 mm (11.3 in) over 25 days. Additionally, humidity levels in May (88%) are slightly higher than in September (85%). For more detailed weather insights, visit Mount Hagen weather in May.
September and June exhibit fairly similar temperatures, with September's minimum temperature at 10°C (51°F) and June's slightly lower at 9°C (49°F). Both months have an average temperature of around 17°C (63°F), but September edges out with a maximum of 25°C (77°F) compared to June's 24°C (75°F). However, September experiences significantly higher precipitation, totaling 256 mm (10.1 in) over 24 days, while June receives 197 mm (7.8 in) over 25 days. Additionally, September's humidity stands at 85%, slightly lower than June's 88%, contributing to a more humid atmosphere in early summer. For more detailed insights into June weather, you can refer to Mount Hagen weather in June.
In comparing the weather of September and July, both months exhibit similar average temperatures of around 17°C (63°F), but September generally experiences slightly warmer maximum temperatures at 25°C (77°F) compared to 24°C (76°F) in July. However, September also sees greater precipitation, with 256 mm (10.1 in) falling over 24 days, compared to July's 213 mm (8.4 in) over 26 days. Humidity levels are almost identical, hovering around 85% in September and 86% in July. For more detailed insights into the July weather, you can visit Mount Hagen weather in July.
In comparing the weather of September and August, it is evident that September experiences slightly cooler average temperatures, with a minimum of 10°C (51°F) and a maximum of 25°C (77°F), while August has a minimum of 11°C (51°F) and a maximum of 24°C (76°F). Both months have a similar average temperature of 17°C (63°F). However, September is notably wetter, receiving 256 mm (10.1 in) of precipitation over 24 days, compared to August's 200 mm (7.9 in) over 26 days. Humidity levels are also quite close, with September at 85% and August slightly higher at 86%. For more detailed weather information, you can check Mount Hagen weather in August.
In comparing the weather between September and October, we observe a slight increase in minimum temperatures, with October averaging a minimum of 11°C (52°F) compared to September's 10°C (51°F). Both months maintain the same average maximum temperature of 25°C (77°F), but October sees an increase in overall precipitation, with 340 mm (13.4 in) over 27 days, compared to September's 256 mm (10.1 in) over 24 days. Humidity levels also rise marginally, from 85% in September to 86% in October. For more specifics on October weather, you can check Mount Hagen weather in October.
September and November exhibit relatively similar temperatures, with September showing a range from 10°C (51°F) to 25°C (77°F) and November slightly warmer with a minimum of 10°C (50°F) and a maximum of 26°C (79°F). However, November tends to be wetter, experiencing significantly higher precipitation at 388 mm (15.3 in) over 27 days compared to September's 256 mm (10.1 in) across 24 days. Additionally, humidity levels in November rise to 90%, making it feel more humid than in September, which has an average humidity of 85%. For detailed weather conditions in this timeframe, you can visit Mount Hagen weather in November.
In September, temperatures range from a mild 10°C (51°F) at night to a comfortable 25°C (77°F) during the day, with an average of 17°C (63°F). The month is characterized by significant rainfall of 256 mm (10.1 in) spread over 24 days, resulting in high humidity levels of 85%. In contrast, December sees slightly warmer temperatures, with a minimum of 12°C (53°F), an average of 18°C (65°F), and a maximum of 26°C (80°F). However, December is notably wetter, experiencing 468 mm (18.4 in) of precipitation across 29 days, contributing to higher humidity at 88%. For more detailed information, you can check Mount Hagen weather in December.
September in Mount Hagen brings a unique blend of mild temperatures and significant rainfall, distinguishing it from both the warmer and drier months of the year. With averages hovering around 17°C and highs reaching 25°C, it offers a comfortable climate for visitors. However, the high humidity and nearly 24 days of precipitation might surprise those used to drier conditions, making it essential to pack accordingly. This month sets the stage for the vibrant lushness of the surrounding landscapes, thanks to the abundant rainfall. For those seeking to dive deeper into the seasonal nuances, you can explore more at Mount Hagen Climate.