Last updated: February 24, 2025
Experience the unique charm of Kilauea, United States, in September, where the weather is a delightful mix of warmth and moisture. With maximum temperatures reaching 28°C (83°F) and an average of 26°C (78°F), the days are pleasantly warm. However, you can expect a cooler breeze at night, with minimum temperatures dropping to 23°C (73°F). September also brings a moderate precipitation amount of 43 mm (1.7 in) over 14 rainy days, contributing to the area's lush greenery. The humidity levels hover around 83%, adding a tropical feel that accentuates the natural beauty of Kilauea. Whether exploring the local flora or simply enjoying the scenery, the September weather offers an inviting escape.
In September, Kilauea experiences a warm embrace of summer, with temperatures maintaining a steady warmth that characterizes the month. The minimum temperature gently rises to 23°C (73°F), while the average hovers comfortably around 26°C (78°F), peaking at a maximum of 28°C (83°F). This month sees a continuation of the warm weather trend established in August, reflecting the transition from high summer to the early autumn season. The consistent warmth is inviting, making it an excellent time for exploring the natural beauty of the area, whether you're trekking through lush trails or soaking in the breathtaking vistas. As the days gradually shorten, the delightful warmth remains a highlight, ensuring that September retains that vibrant tropical charm.
In September, Kilauea experiences a modest dip in precipitation, receiving 43 mm (1.7 in) of rainfall over 14 days. This marks a slight decrease from the previous months, indicating a gradual transition towards the drier season after the summer. Notably, September's rainfall is consistent with August's 44 mm (1.8 in), showcasing a trend of stable yet subdued precipitation as the year progresses. As the fall months approach, Kilauea typically prepares for a resurgence in rainfall, with October often witnessing a significant increase, underscoring the region's dynamic climate patterns.
In September, Kilauea experiences a slight dip in humidity, with levels averaging 83%, down from the consistent 84% observed in the preceding months of June, July, and August. This indicates a subtle shift as the region transitions from the peak of summer humidity into the early autumn months. Overall, the trend shows a gradual increase in humidity from January through May, peaking in the summer, then gently declining as the year progresses. Notably, October sees a further reduction to 81%, suggesting that Kilauea's climate may be easing, providing a brief respite before the humidity stabilizes again in the late fall and winter months.
In Kilauea, United States, the UV Index in September stands at a significant 12, indicating an extreme level of sun exposure. As summer transitions to fall, the UV Index decreases slightly from the peak levels observed in July and August, which both recorded a 13. However, September's values still emphasize the importance of sun protection, as the burn time remains a brisk 10 minutes. This trend of high UV readings, especially prominent during the spring and summer months, showcases Kilauea's need for awareness regarding sun safety throughout the year. For more detailed insights, visit the Kilauea UV Index.
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As summer gently transitions to autumn in Kilauea, September embraces a generous 313 hours of sunshine, marking a slight dip from the peak of 351 hours seen in July. This month retains the warmth of well-sunned August’s 337 hours, revealing a resilient streak of bright days that linger before the cooler months approach. The gradual decline in sunlight hours, starting from May’s robust 335 hours to October's anticipated 298 hours, hints at the inevitable shift in seasons, yet September's glow offers a beautiful reminder of the summer’s lasting embrace. Perfect for outdoor adventures or simply basking in the radiant glow, this month exemplifies the beauty of Kilauea's climate.
As September rolls in, Kilauea enjoys a 57% chance of sunny weather, presenting an appealing opportunity for outdoor activities. This figure aligns closely with the warmer summer months, showing a notable increase from the 48% in July and a slight dip from 64% in August. The transition into fall maintains favorable sunshine probabilities, especially when contrasted with the cooler, cloudier winter months ahead. Overall, September remains a promising time for sun-seekers, bridging the gap between the summer's peak warmth and autumn's gentle onset.
In Kilauea, United States, September's daylight duration offers a gentle transition into autumn, with the sun gracing the skies for approximately 12 hours each day. This continues the trend observed in the summer months, where daylight peaked at 13 hours from May through July. As the year progresses, daylight begins to taper off, reflecting the shifting seasons; following September, daylight decreases to 11 hours in October and November, eventually returning to 10 hours in December. This rhythmic ebb and flow of daylight serves as a beautiful reminder of nature's cycles, providing both a vibrant backdrop for outdoor activities and a comforting predictability as we move toward the shorter days of winter.
In Kilauea, United States, September greets residents and visitors with an inviting average wind speed of 5.5 m/s (12 mph), which is consistent with the breezy conditions experienced in August. This period reflects a gentle shift from the stronger gusts of July, where winds peak at 6.1 m/s (14 mph), creating an ideal environment for enjoying the island's lush landscapes. As the months progress into the fall, the winds taper down, hinting at the more tranquil conditions anticipated in November, which sees a notable drop to 3.9 m/s (9 mph). Overall, September maintains a stable breeziness that encapsulates the transitional spirit of the season while remaining close to the year's average.
The weather in Kilauea 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 Kilauea and find detailed weather information for every month.
In September, the weather tends to be warmer, with average temperatures around 26°C (78°F) and maximums reaching 28°C (83°F). The month also experiences higher humidity at 83% and more frequent rainfall, with precipitation on 14 days totaling 43 mm (1.7 in). In contrast, January brings slightly cooler conditions, with average temperatures dropping to 22°C (72°F) and a maximum of 25°C (78°F). Despite a similar level of precipitation at 46 mm (1.8 in), rainfall occurs on only 9 days, and humidity is marginally lower at 77%. For more detailed information, you can visit Kilauea weather in January.
In September, the weather tends to be warmer with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 28°C (83°F) and an average of 26°C (78°F). The humidity is relatively high at 83%, and the month sees about 43 mm (1.7 in) of precipitation over 14 days. In contrast, February experiences cooler temperatures, with a minimum of 15°C (60°F) and a maximum of 25°C (77°F), averaging at 22°C (71°F). Although February is generally cooler, it has more rainfall, totaling 95 mm (3.7 in) over 16 days, and a slightly lower humidity of 78%. For more specific details about Kilauea's weather in February, you can refer to this link: Kilauea weather in February.
In comparing the weather patterns of September and March, September tends to be warmer with an average temperature of 26°C (78°F), peaking at 28°C (83°F), while March has a slightly cooler average of 22°C (71°F) with a maximum of 25°C (77°F). Precipitation levels are notably higher in March, with 123 mm (4.8 in) of rainfall over 17 days, compared to September's 43 mm (1.7 in) across 14 days. Additionally, both months exhibit high humidity, but September sees a marginally higher level at 83% compared to March's 79%. For more detailed information, you can check out Kilauea weather in March.
When comparing the weather in September and April, September typically offers warmer temperatures, with a minimum of 23°C (73°F) and an average of 26°C (78°F), peaking at a maximum of 28°C (83°F). In contrast, April sees slightly cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 25°C (78°F), leading to an average temperature of 23°C (73°F). Precipitation is also more pronounced in April, totaling 62 mm (2.5 in) over 16 days, compared to September's 43 mm (1.7 in) across 14 days. Humidity levels remain high in both months, with 83% in September and 81% in April. For more details on the specific weather patterns in Kilauea, check out Kilauea weather in April.
In comparing the weather of September and May, both months exhibit similar humidity levels at 83%, contributing to a consistently tropical feel. September experiences slightly warmer temperatures, with a minimum of 23°C (73°F) and an average of 26°C (78°F), compared to May's minimum of 20°C (67°F) and average of 23°C (75°F). Precipitation is nearly equivalent, with September receiving 43 mm (1.7 in) over 14 days and May having 45 mm (1.8 in) over 13 days. For more detailed information, check out Kilauea weather in May.
In comparing the weather of September and June, both months exhibit warm temperatures, with September slightly warmer, featuring a minimum of 23°C (73°F) and an average of 26°C (78°F), while June has a minimum of 22°C (72°F) and an average of 25°C (77°F). The maximum temperatures are also comparable, with September reaching up to 28°C (83°F) and June peaking at 27°C (81°F). However, September sees lesser precipitation at 43 mm (1.7 in) over 14 days compared to June's 68 mm (2.7 in) spread over 12 days. Humidity levels remain high in both months, with September at 83% and June slightly higher at 84%. For more detailed weather information, you can explore Kilauea weather in June.
In comparison to July, September experiences slightly warmer temperatures, with an average of 26°C (78°F) compared to July's average of 25°C (78°F). Both months have similar maximum temperatures, reaching around 28°C (82°F to 83°F). However, September has less precipitation, totaling 43 mm (1.7 in) over 14 days, while July sees more rain, with 52 mm (2.1 in) over 20 days. Additionally, humidity levels are quite comparable, with September at 83% and July at 84%. For more detailed information about July weather, you can visit Kilauea weather in July.
In comparing the weather of September to that of August, we see that both months exhibit similar temperature ranges, with September having a minimum of 23°C (73°F) and a maximum of 28°C (83°F), just slightly higher than August's min of 22°C (73°F) and max of 28°C (83°F). The average temperatures for both months remain constant at 26°C (78°F). However, precipitation in September is slightly lower at 43 mm (1.7 in) over 14 days, compared to August's 44 mm (1.8 in) over 15 days. Humidity also shows a minor decrease, with September at 83% and August slightly higher at 84%. For a more detailed look at the weather specifics, you may refer to Kilauea weather in August.
In September, the weather is generally warm with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 28°C (83°F), averaging around 26°C (78°F). The month sees about 43 mm (1.7 in) of precipitation spread over 14 days, with humidity levels at 83%. In contrast, October brings slightly cooler temperatures, with a minimum of 22°C (71°F) and an average of 25°C (77°F), while still reaching the same maximum of 28°C (83°F). However, October is notably wetter, with 85 mm (3.3 in) of rain falling over 17 days and a slight decrease in humidity to 81%. For more detailed information on Kilauea's weather in October, you can visit Kilauea weather in October.
September tends to be warmer with an average temperature of 26°C (78°F) and maximum highs reaching 28°C (83°F), while November cools down slightly, averaging around 24°C (75°F) with a max of 27°C (81°F). Although both months experience significant humidity, September is slightly more humid at 83%, compared to November's 79%. In terms of rainfall, November sees increased precipitation with 61 mm (2.4 in) over 18 days, compared to September's 43 mm (1.7 in) over 14 days. For more detailed insights, you can check Kilauea weather in November.
In comparing September and December weather, September boasts warmer temperatures with a minimum of 23°C (73°F) and an average of 26°C (78°F), while December features slightly cooler conditions, with a minimum of 18°C (65°F) and an average of 23°C (73°F). Precipitation also increases in December, totaling 104 mm (4.1 in) over 17 days compared to September's 43 mm (1.7 in) over 14 days. Despite the increased rainfall, December's humidity is relatively lower at 79%, compared to September’s higher humidity level of 83%. For more detailed information, you can check Kilauea weather in December.
As September rolls into Kilauea, the weather showcases a delightful mix of warmth and moisture that sets it apart from the drier summer months. With temperatures comfortably hovering around 26°C (78°F), this time of year beckons visitors to soak up the tropical vibes. However, September also ushers in higher humidity levels, making the air feel more lush and vibrant. Rain is more frequent, as evidenced by an average of 14 days of light showers, contributing to the island's rich greenery. For those looking to embrace Kilauea's unique climate, this month offers a refreshing blend of warmth and a touch of rain—perfect for exploring the natural beauty of the area. To learn more about Kilauea's year-round weather patterns, visit Kilauea Climate.