Last updated: August 31, 2025
September in Apia, Samoa offers a warm and humid tropical climate, with maximum temperatures reaching 28°C (83°F) and an average of 26°C (79°F), while nighttime lows dip to a comfortable 24°C (75°F). This month is characterized by significant rainfall, totaling 158 mm (6.2 in) over 25 days, making it one of the wetter periods of the year. With humidity levels hovering around 83%, visitors can expect a rich, verdant landscape but should also be prepared for frequent showers. Whether you're exploring the lush surroundings or relaxing by the coast, September provides a lush backdrop for any adventure in this stunning island paradise.
In September, Apia, Samoa experiences pleasant and consistent temperatures that serve as a delightful transition from the cooler months. The temperatures hover with a minimum of 24°C (75°F) and peak at around 28°C (83°F). The average temperature settles at 26°C (79°F), offering a warm yet comfortable climate for outdoor activities. Notably, as the month progresses, there is a slight decrease in the maximum temperature compared to the earlier months, suggesting the onset of the dry season. This enduring warmth throughout September, coupled with refreshing sea breezes, creates an inviting atmosphere for both locals and visitors alike, making it an ideal time to explore the lush landscapes and vibrant culture of Samoa.
In September, Apia, Samoa experiences a notable shift in precipitation patterns, with an average rainfall of 158 mm (6.2 in) over approximately 25 days. This marks a slight increase from the drier month of August, which recorded 145 mm (5.7 in), and continues the trend of fluctuating rainfall typical of the Pacific island's wet season. As the island transitions towards the more intensely rainy months ahead, September serves as a reminder of the gradual buildup in moisture, paving the way for the heavier downpours expected in October and November. This seasonal ebb and flow not only defines the region's climate but also contributes to the lush, vibrant landscapes that characterize Samoa.
In September, Apia, Samoa experiences a humidity level of 83%, which reflects a slight decrease from the peak of 84% recorded in August. This transition marks a gradual shift as the island moves from the height of winter, where humidity levels are consistently on the rise, peaking in the late months of the year. From June onwards, humidity steadily increased, culminating in August's high. However, September signifies the beginning of cooler, less humid months as the rainfall diminishes and temperatures prepare for a slight dip leading into October. Overall, the humidity trend in Apia showcases a consistent pattern—hovering around the mid-70s to low 80s, with a clear emphasis on the wetter months from June to September.
In September, Apia, Samoa experiences a UV Index of 14, categorized as extreme, with a burn time of just 10 minutes. This marks a slight increase from August’s 12, highlighting the region's consistently high UV exposure as it transitions into October, where the UV Index rises to 15. Throughout the year, Samoa showcases remarkably intense UV levels, particularly in the early months, where values peak at 16 from January to March. As winter approaches, we see a decline, but even during the cooler months of June and July, the UV Index remains at a very high level of 9. Visitors and locals alike should remain vigilant about sun protection, especially in these peak months. For more insights, check out the detailed Apia UV Index.
UV Risk Categories
As September arrives in Apia, Samoa, the island basks in 304 hours of glorious sunshine, marking a delightful transition towards the end of the year. This month stands out with abundant daylight, just shy of the peak 310 hours in October, showcasing a trend of steadily increasing sunshine hours following the mid-year months. With a backdrop of 275 hours in April and 272 hours in June, September's sun-drenched days signal a warm, welcoming atmosphere ideal for outdoor adventures. As summer approaches, visitors can relish the vibrant weather, making it an exceptional time to experience all that this tropical paradise has to offer.
September in Apia, Samoa, welcomes a delightful 71% chance of sunny weather, making it one of the sunniest months of the year. This significant increase follows a summer peak in July with 62% sun and marks a noticeable contrast to the drearier months of January through March, where sunny days are often a mere 32% to 28%. As the dry season approaches, visitors can bask in the warmth and enjoy outdoor activities, with September standing out as an ideal time to experience the vibrant beauty of Samoa under clear skies.
As September arrives in Apia, Samoa, residents and visitors alike can enjoy a delightful return to 12 hours of daylight, mirroring the consistent brightness of the months at the year's start. After a stretch of 11-hour days from April through August, the gradual resurgence of daylight heralds the onset of spring in this tropical paradise. This rhythmic pattern of daylight duration not only enriches daily life but also signals the approach of the sun-drenched months ahead, maintaining an inviting atmosphere throughout the year. With both October and November promising the same generous hours of daylight, September serves as a seamless transition back to longer, sunlit days, perfect for outdoor adventures and island exploration.
In September, the winds in Apia, Samoa, begin to gather momentum, showcasing an average speed of 5.0 m/s (11 mph). This noticeable increase follows the gustier July, where winds peaked at 5.9 m/s (13 mph), and remains robust into October with similar speeds. As the year progresses, it’s evident that the wind generally picks up through the mid-year months, peaking in July, before slightly tapering off towards the end of the year. Interestingly, September strikes a balance, offering a refreshing breeze that is still energetic yet comfortable, making it an ideal time for outdoor adventures and exploration in this picturesque tropical paradise.
Weather in Apia varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Apia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather boasts warm temperatures with a minimum of 24°C (75°F), an average of 26°C (79°F), and a maximum of 28°C (83°F). However, September is also marked by significant rainfall, receiving about 158 mm (6.2 in) over 25 days, accompanied by high humidity levels of 83%. In contrast, January experiences slightly warmer averages, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (86°F) and an average of 27°C (81°F). Despite the warmth, January sees an increase in precipitation, totaling 335 mm (13.2 in) over 24 days, but with slightly lower humidity at 78%. For more details about the weather conditions in January, you can check Apia weather in January.
In comparing the weather conditions of September and February, we see some similarities as well as notable differences. In both months, the minimum temperatures hover around 24°C (75°F), but February tends to be slightly warmer overall, with an average of 27°C (80°F) and maximums reaching up to 30°C (86°F). September features an average temperature of 26°C (79°F) with maximums of 28°C (83°F).
Precipitation levels also differ significantly; September experiences 158 mm (6.2 in) of rain over 25 days, while February is much rainier, accumulating 482 mm (19.0 in) across 27 days. This leads to a slightly lower humidity level in February at 78%, compared to September’s higher humidity of 83%. For those looking for detailed insights into February weather, check out Apia weather in February.
September and March exhibit similar temperature ranges, both featuring a minimum temperature of around 24°C (75°F-76°F) and average highs that only slightly vary, with March reaching a maximum of 29°C (84°F) compared to September's 28°C (83°F). However, March tends to be wetter, receiving 219 mm (8.6 in) of precipitation over 26 days compared to September's 158 mm (6.2 in) over 25 days. Humidity levels are also somewhat lower in March at 78%, compared to September's 83%. For a detailed view of the weather in March, you can refer to Apia weather in March.
In September, the weather in Apia is characterized by a warm and humid climate, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 28°C (83°F) and an average of 26°C (79°F). The month sees considerable rainfall, totaling 158 mm (6.2 in) over 25 days, resulting in a humidity level of 83%.
In contrast, April experiences slightly warmer temperatures, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 29°C (85°F) and an average of 27°C (81°F). Precipitation is more substantial in April, reaching 235 mm (9.2 in) over 26 days, while humidity dips to 78%. For more details on April's weather, check out Apia weather in April.
In comparing the weather of September and May, we can see some notable differences despite similar temperature ranges. In September, the temperatures range from a minimum of 24°C (75°F) to a maximum of 28°C (83°F), with an average of 26°C (79°F). This month experiences 158 mm (6.2 in) of precipitation over 25 days and a high humidity of 83%. In contrast, May sees slightly warmer temperatures, with a minimum of 24°C (76°F) and a maximum of 29°C (85°F), averaging around 27°C (81°F). However, it also has more rain, with 212 mm (8.3 in) spread over 28 days, and a lower humidity level of 79%. For more insights into the May weather, you can refer to Apia weather in May.
In comparing the weather of September and June, both months exhibit fairly similar temperature ranges, with September seeing a minimum of 24°C (75°F) and a maximum of 28°C (83°F), while June has slightly higher temperatures, ranging from a minimum of 24°C (76°F) to a maximum of 29°C (84°F). Despite the minor differences in temperature, June experiences higher overall average warmth at 27°C (80°F) compared to September’s 26°C (79°F). Precipitation levels are also notable, with September receiving 158 mm (6.2 in) and June slightly wetter at 178 mm (7.0 in), both months having precipitation on approximately 25 days. Humidity is quite similar, at 83% in September and 80% in June. For more detailed information, check out Apia weather in June.
In comparing the weather between September and July, both months exhibit similar temperature ranges, with minimums around 23-24°C (75°F) and average highs peaking at 28°C (83°F). However, September experiences less rainfall, with 158 mm (6.2 in) of precipitation over 25 days, compared to July's higher total of 241 mm (9.5 in) over 27 days. Humidity levels are also slightly higher in September at 83%, while July maintains a more moderate 81%. For a detailed look at July's weather patterns, you can visit Apia weather in July.
In comparing the weather of September and August, we see quite similar temperature patterns, with both months having a minimum of 24°C (75°F), an average of 26°C (79°F), and a maximum of 28°C (83°F). However, September experiences slightly higher precipitation, totaling 158 mm (6.2 in) over 25 days, compared to August’s 145 mm (5.7 in) over 23 days. Humidity levels are also marginally lower in September at 83%, while August records a humidity level of 84%. For more details, you can check Apia weather in August.
September and October weather present a similar temperature range, with both months experiencing minimum temperatures around 24°C (75°F) and maximums reaching up to 28°C (83°F). However, October sees a notable increase in precipitation, totaling 266 mm (10.5 in) over 28 days, compared to September’s 158 mm (6.2 in) over 25 days. Humidity levels remain relatively stable, hovering around 82% in October and 83% in September. For a more detailed look at October weather specifics, you can check out Apia weather in October.
In comparing the weather between September and November, we see some interesting similarities and differences. Both months maintain a minimum temperature of 24°C (75°F) and an average temperature around 26°C (79°F), with November experiencing a slightly higher maximum temperature of 29°C (84°F) compared to September's 28°C (83°F). However, November is noticeably wetter, with total precipitation rising to 296 mm (11.6 in) over 27 days, compared to September's 158 mm (6.2 in) across 25 days. Despite the increased rainfall, the humidity in November is slightly lower at 79%, down from September's 83%. For more detailed insights on the weather in November, you can check Apia weather in November.
In September, the weather is warm with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 28°C (83°F). However, it is also the wettest month with significant rainfall of 158 mm (6.2 in) spread over 25 days and high humidity at 83%. In contrast, December sees slightly warmer temperatures, with averages from a minimum of 24°C (75°F) to a maximum of 29°C (85°F). Nonetheless, it experiences substantially higher precipitation, totaling 403 mm (15.9 in) over 29 days, while humidity remains relatively comfortable at 79%. For a closer look at December's weather patterns, you can check Apia weather in December.
As September rolls in, Apia experiences a delightful blend of warmth and humidity that sets it apart from other months. With temperatures consistently hovering around a pleasant average of 26°C (79°F), the month is characterized by its substantial rainfall, totaling 158 mm (6.2 in) over around 25 days. This period marks a notable uptick in precipitation compared to the drier seasons, contributing to the region's lush landscapes. Despite the rain, the high humidity of about 83% keeps the air feeling tropical and invigorating. For a more detailed look into Apia's climate patterns throughout the year, visit Apia Climate.