Last updated: August 31, 2025
In Vailima, Samoa, September brings a warm tropical climate with average temperatures hovering around 26°C (79°F). The maximum reaches a pleasant 28°C (83°F), while the minimum stays comfortably at 24°C (75°F). However, visitors should be prepared for the region's notable humidity, which averages at a sticky 83%. Rain is a frequent companion this month, with 158 mm (6.2 in) of precipitation spread over 25 days, making it one of the wetter months. Those looking to experience Vailima's lush, vibrant landscapes might encounter some brief showers, but the warmth and natural beauty make it a worthy destination during September.
In September, Vailima, Samoa experiences pleasant and consistent temperatures that perfectly embody its tropical climate. With a minimum of around 24°C (75°F) and a maximum of 28°C (83°F), the month retains a comfortable average of 26°C (79°F), marking a subtle shift as it transitions from the cooler months of winter. The temperatures remain stable compared to August, suggesting a faint warming trend that precedes the warmer months ahead. This delightful weather not only invites sun-seekers to revel in outdoor activities but also offers a welcomed respite from the intense heat often associated with tropical destinations. As September unfolds, the enchanting embrace of Vailima’s climate becomes an irresistible draw for travelers.
In September, Vailima, Samoa experiences a moderate shift in precipitation, receiving 158 mm (6.2 in) of rain over 25 days. This represents a notable decrease from the heavier rains of the previous months, particularly August, which recorded just 145 mm despite having fewer rain days. As the dry season approaches, September's rainfall hints at a transitional phase; while the region still faces frequent showers, the overall trend indicates a gradual tapering off in precipitation amounts as it moves towards October, where a significant uptick to 266 mm (10.5 in) is expected. This rhythm of wet and dry underscores the island's tropical climate, characterized by the ebb and flow of rains as they build up through the months.
In September, Vailima, Samoa, experiences a humidity level of 83%, slightly lower than the 84% recorded in August. This marks a peak in a gradual increase that began in the earlier summer months, where humidity rose from 78% in January through to 81% in July. As the region transitions into the more humid months of late summer, September’s levels suggest a continuing pattern characterized by high moisture content in the air, typical of Vailima's tropical climate. Overall, the trend highlights a consistent humidity range through the year, with noticeable fluctuations as the seasons change, reinforcing the lush and vibrant ecosystem that defines this beautiful region.
As the months progress in Vailima, Samoa, the UV Index presents a remarkable consistency, particularly in the first half of the year, where extreme levels dominate with values holding steady at 16 for January through March. A slight decrease in April brings it down to 13, but it remains in the extreme category, with burn times languishing around 10 minutes. The trend continues with May at 11, before dipping to a very high 9 in both June and July, suggesting a brief respite from the intense sun. However, as August rolls in, the UV Index surges back to 12, signaling the return of extreme conditions. Notably, in September, Vailima experiences a UV Index of 14, emphasizing that the sun's fierce intensity remains a concern. To stay informed about the UV conditions and protect yourself effectively, check out the detailed updates at Vailima UV Index.
UV Risk Categories
September shines brightly in Vailima, Samoa, with an impressive 304 hours of sunshine, marking it as one of the sunniest months of the year. As the seasons shift, the sunny days in September continue a trend of increasing daylight, building on the robust hours of August’s 295 and foreshadowing an even sunnier October ahead with 310 hours. The consistent rise in sunshine from the earlier months, such as January’s 231 hours and February’s 218, reflects a dynamic pattern of warmth that is characteristic of Vailima’s enchanting climate. This delightful progression offers the perfect backdrop for outdoor adventures and leisurely afternoons, making September a particularly inviting time to experience the beauty of Samoa.
As September rolls in, Vailima, Samoa, boasts a promising 71% chance of sunny weather, making it one of the sunniest months of the year. This marks a significant rise from the preceding months, where July and August had 62% and 45% chances of sunshine, respectively. The trend is clear; as the dry season peaks, residents and visitors alike can expect ample opportunities to soak up the sun after relatively cloudier months earlier in the year. With the beautiful tropical climate in full swing, September is the perfect time to enjoy outdoor activities and bask in the radiant views that Vailima has to offer.
In Vailima, Samoa, September marks a refreshing transition as daylight stretches back to a full 12 hours after the cooler months. This month signals a subtle shift from the 11-hour daylight duration experienced from April through August, gently nudging residents and visitors alike toward a sun-filled experience. As the year progresses, the daylight remains stable, with 12-hour spans from January to March returning in October, establishing an unmistakable rhythm of light that characterizes the region's tropical climate. This consistency enhances the vibrant atmosphere, making September an ideal time for outdoor adventures and enjoying the lush surroundings that Samoa has to offer.
As September rolls into Vailima, Samoa, the wind begins to dance with a refreshing vigor, averaging 5.0 m/s (11 mph). This marks a subtle increase from the summer months, where winds peaked in July at 5.9 m/s (13 mph), followed by a slight decline in August. The transition into September highlights a trend where the early part of the year sees milder winds, averaging between 3.0 and 4.1 m/s. However, as the year progresses into its latter months, including October with 4.9 m/s, the winds remain relatively brisk and invigorating. This interplay of gentle breezes and stronger gusts not only creates a unique climate but also enhances the natural beauty and allure of this Samoan paradise.
Weather in Vailima varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Vailima, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit distinctly different weather patterns, though both months maintain warm temperatures. In September, the average temperature hovers around 26°C (79°F) with a maximum of 28°C (83°F), accompanied by considerable rainfall of 158 mm (6.2 in) across 25 days and relatively high humidity at 83%. In contrast, January presents slightly warmer conditions, featuring an average temperature of 27°C (81°F) and a maximum of 30°C (86°F), but it sees a significant increase in rainfall, totaling 335 mm (13.2 in) over 24 days and a slightly lower humidity of 78%. For more details on January weather, visit Vailima weather in January.
In comparing the weather between September and February, we can see some notable similarities and differences. Both months enjoy warm temperatures, with September averaging 26°C (79°F) and February slightly warmer at an average of 27°C (80°F). However, February experiences higher maximum temperatures, reaching up to 30°C (86°F) compared to September's 28°C (83°F).
Precipitation levels also vary significantly; September receives 158 mm (6.2 in) over 25 days, while February sees a substantial increase, with 482 mm (19.0 in) of rainfall over 27 days. This higher rainfall in February translates into a somewhat lower humidity of 78%, compared to September's 83%. For more detailed insights into February weather, you can refer to Vailima weather in February.
When comparing the weather in September and March, both months experience similar warm temperatures, with September averaging 26°C (79°F) and March slightly warmer at an average of 27°C (81°F). The minimum temperatures are nearly identical, starting at around 24°C (75°F) to 24°C (76°F). However, March sees higher maximum temperatures, peaking at 29°C (84°F) compared to September's 28°C (83°F). Precipitation is significantly greater in March, with 219 mm (8.6 in) over 26 days, while September experiences 158 mm (6.2 in) across 25 days. Humidity levels are relatively high in both months, sitting at 83% in September and slightly lower at 78% in March. For more detailed information, check out Vailima weather in March.
When comparing the weather in September and April, both months exhibit warm temperatures, but with some notable differences. September has a slightly lower average temperature, ranging from a minimum of 24°C (75°F) to a maximum of 28°C (83°F), while April sees an increase in averages, with temperatures ranging from 24°C (76°F) to 29°C (85°F). Additionally, April experiences higher precipitation levels, totaling 235 mm (9.2 in) over 26 days, compared to September's 158 mm (6.2 in) across 25 days. While September has a higher humidity at 83%, April's humidity is lower at 78%, contributing to a more comfortable experience despite the increased rainfall. For more detailed insights, check out Vailima weather in April.
When comparing the weather in September and May, we find that both months have similar minimum temperatures, averaging around 24°C (75°F). However, May typically experiences slightly warmer average and maximum temperatures, with averages of 27°C (81°F) and maximums reaching 29°C (85°F). In terms of precipitation, May is wetter, receiving 212 mm (8.3 in) across 28 days, compared to September's 158 mm (6.2 in) over 25 days. Additionally, September has a higher humidity level at 83%, while May's humidity is a bit lower at 79%. For more detailed information, check Vailima weather in May.
In comparing the weather of September and June, both months feature similar temperature ranges, with September having an average of 26°C (79°F) compared to June's 27°C (80°F). However, September tends to be slightly cooler overall, with maximum temperatures reaching 28°C (83°F) compared to June's 29°C (84°F). Both months experience about 25 days of precipitation, but September sees an average rainfall of 158 mm (6.2 in), which is a bit lower than June's 178 mm (7.0 in). Humidity levels are relatively high in both months, with September at 83% and June at 80%. For more detailed information on June weather, you can check Vailima weather in June.
In both September and July, the temperatures in Vailima remain relatively stable, with minimums around 23-24°C (75°F) and maximums reaching 28°C (83°F). However, September experiences slightly lower overall precipitation, averaging 158 mm (6.2 in) across 25 rainy days compared to July's 241 mm (9.5 in) over 27 days. Additionally, September's humidity is slightly higher at 83%, compared to July's 81%, contributing to a particularly muggy feel as the seasons transition. For more detailed insights, check out Vailima weather in July.
Both September and August exhibit similar temperature ranges, with minimums at 24°C (75°F), average highs of 26°C (79°F), and maximums peaking at 28°C (83°F). However, September sees slightly increased rainfall with 158 mm (6.2 inches) over 25 days, compared to August, which experiences 145 mm (5.7 inches) over 23 days. Humidity levels remain fairly consistent, hovering around 83% in September and 84% in August. For a more detailed look at August weather, visit Vailima weather in August.
In September, the weather features consistently warm temperatures, with an average of 26°C (79°F) and a maximum of 28°C (83°F), but the month also hosts frequent rainfall, totaling 158 mm (6.2 in) across 25 days and a high humidity level of 83%. Conversely, October maintains similar temperatures, with the same averages and maximums, but experiences a significant increase in precipitation to 266 mm (10.5 in) over 28 days, and slightly reduced humidity at 82%. This shift highlights October as a month of heightened rainfall while retaining the warmth characteristic of the preceding month. For more information, check out Vailima weather in October.
In September, the weather features warm temperatures, with a minimum of 24°C (75°F) and an average of 26°C (79°F), peaking at 28°C (83°F). However, this month also experiences significant rainfall, totaling 158 mm (6.2 in) over 25 days, contributing to high humidity levels of 83%. In contrast, November brings slightly warmer conditions with a similar minimum of 24°C (75°F) and an average of 26°C (80°F), but it reaches a higher maximum of 29°C (84°F). The precipitation in November is notably higher at 296 mm (11.6 in) over 27 days, yet the overall humidity remains lower at 79%. For more detailed insights into November weather conditions, you can visit Vailima weather in November.
In comparison to September, December's weather sees a slight increase in temperature, with average highs reaching 29°C (85°F) compared to September's 28°C (83°F). Both months maintain a minimum temperature of 24°C (75°F), but December experiences higher average temperatures overall. However, December also brings significantly more rainfall, with precipitation rising to 403 mm (15.9 in) over 29 days, compared to 158 mm (6.2 in) over 25 days in September. Despite the increased rainfall, December’s humidity remains relatively stable at 79%, just slightly lower than the 83% experienced in September. For a more detailed overview, check out Vailima weather in December.
September in Vailima brings a unique blend of warm temperatures and abundant rainfall, setting it apart from other months. With average temperatures resting comfortably around a pleasant 26°C, this time of year offers a delightful respite from the heat while also welcoming the high humidity typical of the region. However, it's the significant precipitation, with around 25 days of rain totaling 158 mm, that characterizes September, making it one of the wetter months. The combination of green landscapes fueled by frequent showers and warm, inviting days creates a vibrant atmosphere, ideal for those who appreciate tropical beauty in full bloom. For a more comprehensive look at the weather trends throughout the year, visit Vailima Climate.