Last updated: February 24, 2025
September in Kapa'a, United States, presents a delightful blend of warm temperatures and tropical humidity. With maximum temperatures reaching up to 28°C (83°F) and an average of 25°C (78°F), the climate remains inviting yet comfortable. The minimum temperature hovers around 23°C (73°F), ensuring pleasant evenings. However, this month also brings significant rainfall, with total precipitation measuring 65 mm (2.5 in) across 21 days, contributing to the lush landscapes of the region. The humidity level, averaging 82%, enhances the tropical feel, creating a vibrant atmosphere for both locals and visitors alike.
In Kapa'a, United States, September marks a transitional phase into the heart of autumn, yet the warmth of summer lingers on. With minimum temperatures averaging around 23°C (73°F) and highs reaching up to 28°C (83°F), the month offers a delightful blend of warmth and comfort. The average temperature remains a pleasant 25°C (78°F), consistent with the trends observed since June, where temperatures gradually rose through the summer. This month continues the theme of relatively stable temperatures characteristic of the region, ensuring that visitors can enjoy outdoor activities amidst sun-soaked days and balmy evenings. As September unfolds, Kapa'a boasts a harmonious climate, making it an inviting destination for relaxation and exploration.
In September, Kapa'a experiences a moderate precipitation level of 65 mm (2.5 in), continuing a fairly consistent trend noted throughout the year. With 21 days of rainfall, this month mirrors the lush, tropical climate typical of the region, although it is slightly less wet compared to the heavier rains seen in March and December. This pattern showcases a gradual decline in precipitation from the early summer months, which peak in July and August, down to early fall. Despite the decrease, September still provides ample moisture, setting the stage for vibrant vegetation and maintaining the island's enchanting landscape.
In Kapa'a, United States, September continues the trend of high humidity typical for this region, registering at 82%. As the year progresses, humidity gradually rises from 78% in January to a peak of 83% in both July and August, before slightly tapering off in the fall. This consistent level of humidity throughout the summer months not only sets the stage for the lush, vibrant landscapes that the area is known for but also provides a warm, tropical feel. With the humidity dipping a bit in October and November, residents can enjoy a subtle shift in the air, yet September's balmy conditions remain a hallmark of Kapa'a's inviting atmosphere.
In September, Kapa'a experiences a UV Index of 12, categorized as extreme, with a burn time of only 10 minutes. This marks a slight decline from the peak levels observed in the summer months, where the UV Index soared to 13. The trend throughout the year illustrates a significant uptick in UV exposure starting from January's moderate 7 and reaching notable highs in the warmer months, particularly from April to August. By the time September rolls around, although there's a minor drop, the UV Index remains dangerously high, reminding residents and visitors alike to remain vigilant about sun safety. For more detailed information on UV levels throughout the year, check out Kapa'a UV Index.
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In Kapa'a, United States, September ushers in a delightful balance of sunshine, boasting 315 hours of sunlight, a welcome continuation of the vibrant summer months. The trend reveals a steady peak from May through July, where sunshine thrives, with July claiming the top spot at 349 hours. As summer gives way to fall, the sun remains generous, providing ample daylight in September before gradually tapering off in October. This gradual decline in sunny hours highlights the transition into cooler months while still offering plenty of opportunities to bask in the warm, golden glow of the Hawaiian sun. Each month unfolds a narrative of light, reminding us to savor these radiant moments before they begin to fade.
As September rolls in Kapa'a, the likelihood of sunny weather remains quite favorable, with a 54% chance of sunshine. This is a slight dip from the peak of 61% observed in August, yet it stands solidly above the earlier months like March and April. Notably, the summer months seem to have the highest potential for sun, with June and August leading the way, while the year closes with a much lower chance in December at only 33%. Overall, visitors in September can still anticipate a good mix of sunshine, perfect for enjoying the island's beautiful landscapes before the cloudier months set in.
In September, Kapa'a enjoys a delightful 12 hours of daylight, marking a subtle shift as summer begins to wane. This month mirrors the daylight durations of both April and August, highlighting a trend of stability as we transition from the longer days of summer into the shorter days of fall. While May through July basked in the peak of daylight with 13 hours, September’s consistent 12 hours signals the onset of a gradual reduction. Following this pattern, daylight will further decrease in October and November, reminding us that as the sun sets earlier, the warm hues of autumn will soon paint the landscape.
As September arrives in Kapa'a, the winds carry a familiar rhythm, maintaining an average speed of 5.5 m/s (12 mph)—a level consistent with both January and October. This month marks a transition from the lively breezes of summer, highlighted by July's higher gusts peaking at 6.0 m/s (14 mph), settling into a more moderate flow. Interestingly, while September's winds mirror earlier months, they also suggest an upcoming dip as November approaches, which typically sees a decrease to 3.9 m/s (9 mph). Overall, the winds in September reflect both a moment of stability and a harbinger of change, expertly shaping the coastal landscape of Kapa'a.
The weather in Kapa'a changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Kapa'a and find detailed weather information for every month.
In September, temperatures are generally warmer with a minimum of 23°C (73°F) and an average of 25°C (78°F), peaking at a maximum of 28°C (83°F). The month experiences higher humidity at 82% and sees about 65 mm (2.5 in) of precipitation across 21 days. In contrast, January is slightly cooler, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 25°C (78°F), averaging 22°C (73°F). It also has less rainfall, accumulating 60 mm (2.3 in) over just 11 days, and a marginally lower humidity level of 78%. For more details, you can check out this link: Kapa'a weather in January.
September and February showcase distinct weather patterns, with September typically being warmer. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 28°C (83°F), accompanied by an average of 25°C (78°F) and high humidity at 82%. This month also experiences around 65 mm (2.5 in) of precipitation over 21 days, making for a moderately wet start to the fall.
In contrast, February has slightly cooler temperatures, with a minimum of 16°C (62°F) and a maximum of 26°C (78°F) while averaging at 22°C (71°F). The month sees more rainfall, with precipitation measuring 94 mm (3.7 in) over 17 days and a humidity level of 79%. For more details about the weather during this month, you can check Kapa'a weather in February.
In comparing the weather between September and March, September tends to be warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 28°C (83°F). In contrast, March offers slightly cooler temperatures, with a minimum of 18°C (65°F) and a maximum of 25°C (78°F). Precipitation is notably higher in March, with 156 mm (6.1 in) compared to September's 65 mm (2.5 in), and both months experience rainfall on approximately 21 days. The humidity remains relatively high in both months, with September at 82% and March at 78%. For more detailed insights about March weather, you can check Kapa'a weather in March.
In comparing the weather between September and April, both months exhibit relatively warm temperatures, with September slightly warmer overall. September boasts a minimum temperature of 23°C (73°F) and an average of 25°C (78°F), while April’s minimum is a touch cooler at 19°C (67°F) and an average of 23°C (73°F). Rainfall is almost comparable, with September receiving 65 mm (2.5 in) over 21 days and April experiencing marginally higher precipitation at 80 mm (3.2 in) over 20 days. Humidity levels are also quite similar, with September at 82% and April at 81%. For more detailed information on April weather, you can visit Kapa'a weather in April.
When comparing the weather in September and May, both months exhibit similar average temperatures and levels of humidity. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 28°C (83°F), while May shows a slightly cooler range of 19°C (67°F) to 27°C (81°F). Both months experience the same average humidity of 82% and similar precipitation levels, with September having 65 mm (2.5 in) and May slightly less at 63 mm (2.5 in), spread over 21 days in each case. To explore more about the specific weather in May, you can check Kapa'a weather in May.
In comparing the weather of September and June, we find that September typically has slightly warmer temperatures, with a minimum of 23°C (73°F) and an average of 25°C (78°F), compared to June's minimum of 21°C (71°F) and average of 24°C (76°F). However, June experiences more precipitation overall, receiving 92 mm (3.6 in) across 20 days, while September sees less rain, amounting to 65 mm (2.5 in) over 21 days. Both months share similar humidity levels at 82%, maintaining a consistent tropical feel. For more specific details on June weather, check out Kapa'a weather in June.
In comparing the weather between September and July, both months experience similar temperature ranges, with July showing slightly lower temperatures on average and a minimal difference in maximum highs. September's average temperature hovers around 25°C (78°F), mirroring July's 25°C (77°F). However, July tends to be a bit wetter, with 80 mm (3.2 in) of precipitation over 26 days compared to September's 65 mm (2.5 in) across 21 days. Additionally, humidity levels remain high in both months, at 82% in September and 83% in July, creating a consistently tropical atmosphere. For a closer look at July’s weather specifics, visit Kapa'a weather in July.
When comparing the weather between September and August, we see some subtle differences. September features slightly warmer minimum temperatures at 23°C (73°F) when compared to August's minimum of 22°C (73°F). Both months share the same average and maximum temperatures, maintaining a pleasant warmth with averages around 25°C (78°F) and peaks of 28°C (83°F). However, September experiences a decrease in total precipitation with 65 mm (2.5 in) over 21 days, while August has 80 mm (3.2 in) over 23 days, indicating slightly wetter conditions earlier in the summer. Humidity levels in both months are similarly high, with September at 82% and August at 83%. For more details, you can check Kapa'a weather in August.
September and October exhibit similar temperature ranges, with both months averaging around 25°C (77°F) and reaching maximum temperatures of 28°C (82°F). However, October tends to be slightly wetter, experiencing 95 mm (3.7 in) of precipitation over 22 days, compared to September’s 65 mm (2.5 in) over 21 days. Humidity levels remain consistent, with September at 82% and October at 81%. If you’re interested in specific conditions for Kapa'a, you can learn more about Kapa'a weather in October.
In comparing the weather of September and November, both months exhibit relatively warm temperatures, with September slightly warmer, averaging around 25°C (78°F) compared to November's 24°C (76°F). While September experiences a minimum temperature of 23°C (73°F), November is a bit cooler with a minimum of 21°C (69°F). Precipitation levels are higher in November, totaling 76 mm (3.0 in) compared to September's 65 mm (2.5 in), although both months feature rain on about 21 days. Humidity levels are quite similar, with September at 82% and November slightly less at 80%. For more detailed insights on November weather, you can check Kapa'a weather in November.
In September, the weather is generally warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 28°C (83°F) and relatively high humidity at 82%. This month sees a total precipitation of 65 mm (2.5 in) spread over 21 days, making it a bit rainy but still warm. In contrast, December experiences slightly cooler temperatures, with a minimum of 19°C (66°F) and an average of 23°C (74°F). However, it is notably wetter, with precipitation reaching 127 mm (5.0 in) across the same number of rainy days, while humidity decreases slightly to 79%. For more detailed insights into December weather specifically, you can check Kapa'a weather in December.
As September unfolds in Kapa'a, it brings a unique blend of warmth and humidity that sets it apart from the preceding summer months. With a comfortable average temperature hovering around 25°C, this time of year offers pleasant conditions for visitors and locals alike. However, the increased precipitation, totaling 65 mm over 21 days, introduces an element of unpredictability, making it one of the wetter months. This means that while the days may be warm, brief showers can provide a refreshing break from the heat, enhancing the lush scenery of the island. For more details on Kapa'a's weather patterns and trends, check out Kapa'a Climate.