Last updated: February 24, 2025
In Kahului, United States, September weather offers a delightful blend of warmth and humidity. With maximum temperatures reaching 32°C (89°F) and an average of 27°C (80°F), the month is characterized by pleasant tropical conditions. Nights cool down to a comfortable minimum of 23°C (73°F), providing a soothing respite. While the island experiences some precipitation, averaging 17 mm (0.7 in) over just 4 days, the humidity remains notably high at 84%, creating a lush and vibrant atmosphere. Visitors can expect a warm, tropical experience with just a hint of rain, making September a wonderful time to explore the beauty of Kahului.
As September rolls in, Kahului, United States, experiences a delightful transition in its temperatures, offering a perfect blend of warmth and comfort. With minimums around 23°C (73°F), the nights are pleasantly mild, while average temperatures peak at about 27°C (80°F). Daytime sees the mercury rise to a balmy 32°C (89°F), making it one of the warmest months of the year. This slight uptick from August’s highs signifies a gradual shift toward the sultry days of early fall, beckoning residents and visitors alike to enjoy the lush landscapes and sun-soaked beaches. September’s consistent warmth, paired with captivating sunsets, embodies the ultimate Hawaiian experience.
In September, Kahului experiences a notable drop in precipitation, with only 17 mm (0.7 in) of rain spread over just 4 days. This marks a continuation of the dry trend initiated in the preceding summer months, particularly June, which saw an even lower 11 mm (0.4 in). While the late-summer rainfall was moderate, September’s totals reflect a shift as the region transitions into the wetter months ahead. As the year progresses towards October—characterized by a significant rise in precipitation to 40 mm (1.6 in)—September serves as a brief interlude, maintaining a balance in Kahului's diverse climate cycle.
In Kahului, United States, September marks a subtle shift in humidity levels, with an average of 84%—a slight decrease from the peak of 85% experienced during the summer months of July and August. This trend reflects a gradual transition towards the drier fall season, as humidity consistently hovers in the low to mid-80s from May through September. Overall, the data reveals a relationship between the warmer months and higher humidity, with a noticeable drop as the year progresses, settling at 83% in October and continuing to decline through the last quarter. The relatively high humidity levels throughout the year contribute to Kahului's lush landscapes, creating a vibrant and inviting atmosphere that residents and visitors alike can enjoy.
In September, Kahului experiences a UV Index of 12, maintaining its status in the extreme exposure category, and requiring a burn time of just 10 minutes. This trend of high UV levels, which has consistently dominated the summer months, shows that the region's sun intensity remains strong even as it transitions into autumn. The UV Index begins to decline slightly in October, indicating that while the risk is still present, the most intense sun exposure is waning. As summer fades, it’s crucial for residents and visitors alike to remain vigilant about sun protection during this high-risk period, keeping in mind the need for quick action to avoid burns. For more information on UV levels throughout the year, visit Kahului UV Index.
UV Risk Categories
As September unfolds in Kahului, residents and visitors alike can bask in the golden embrace of 316 hours of sunshine. Following the sunniest months of July and June, September offers a delightful transition toward the cooler autumn days, while still delivering a generous amount of bright skies. The month seamlessly bridges summer's vibrant warmth and the upcoming seasonal shifts, exceeding the sun hours of October and November. This trend marks a consistent high for the year, as it reflects an overall increase in daylight hours from January's 222. With each passing month, Kahului's sun paints a stunning backdrop for outdoor adventures, making September an ideal time to enjoy the island's natural beauty.
In Kahului, September heralds a promising transition into autumn with a 60% chance of sunny weather. This figure reflects a notable peak, as the month continues the upward trend from the warmer summer months, specifically following the 69% chance of sun in August. As September approaches, residents and visitors alike can expect a delightful mix of sunshine and lingering warmth, contributing to outdoor activities and scenic exploration. With the likelihood of sunny days persisting through October, it's clear that early fall still holds a charm for those seeking the brightness of Maui's skies.
As September rolls into Kahului, the daylight duration settles at a comfortable 12 hours, marking a smooth transition from the longer days of summer. Throughout the year, daylight gradually increases from 11 hours in January and February to a peak of 13 hours during the summer months of May, June, and July. As autumn approaches, the days begin to shorten again, with September signaling the start of this gradual decline. This rhythm of daylight reflects the island's seasonal changes, offering a blend of vibrant sunlit hours that residents and visitors alike can savor before the gradual return to cozy, shorter days in October.
In Kahului during September, the average wind speed reaches 5.0 m/s (11 mph), providing a refreshing breeze that characterizes the transition into fall. This month stands out as a slight uptick from August's 4.9 m/s, maintaining a steady wind pattern that has been subtly increasing since July's peak at 5.6 m/s (13 mph). The trend shows that wind speeds generally rise through the summer months, peaking in mid-summer, before beginning a gradual decline as autumn approaches. Overall, September's winds contribute to the vibrant and dynamic atmosphere, making it a delightful time to enjoy outdoor activities in this charming coastal town.
The weather in Kahului 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 Kahului and find detailed weather information for every month.
In September, the weather is typically warmer, with minimum temperatures around 23°C (73°F) and maximums reaching 32°C (89°F). This month experiences an average temperature of 27°C (80°F) and relatively high humidity at 84%, along with light precipitation of about 17 mm (0.7 in) over 4 days. In contrast, January sees cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 28°C (83°F), and an average of 23°C (74°F). Although January has slightly more rainfall at 32 mm (1.3 in) over 5 days, it is characterized by lower humidity at 78%. For more detailed insights, you can explore Kahului weather in January.
In September, the weather tends to be warmer, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 32°C (89°F). The month experiences relatively low precipitation, with only 17 mm (0.7 in) over about four days, and high humidity at 84%. In contrast, February is cooler, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 28°C (83°F) and an average of 23°C (73°F). However, February is wetter, receiving 75 mm (2.9 in) of rainfall over approximately ten days, accompanied by slightly lower humidity at 79%. For more detailed insights, you can visit Kahului weather in February.
September weather typically features warmer temperatures, with a minimum of 23°C (73°F) and an average of 27°C (80°F), reaching a maximum of 32°C (89°F). In contrast, March brings cooler conditions, with a minimum of 18°C (64°F) and an average of 23°C (74°F), peaking at 29°C (84°F). While September experiences less rainfall—17 mm over 4 days—March is notably wetter, receiving 52 mm across 10 days. Additionally, September has slightly higher humidity at 84%, compared to March's 79%. For further details, check out Kahului weather in March.
September and April weather can be quite contrasting, with September generally warmer and drier than April. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 32°C (89°F), with an average of 27°C (80°F) and only 17 mm (0.7 in) of precipitation over about 4 days. In contrast, April sees cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 29°C (84°F), averaging 24°C (75°F). April is also wetter, experiencing 49 mm (1.9 in) of rain across 9 days, though humidity levels remain relatively similar at 82%. For more detailed insights about April weather, you can visit Kahului weather in April.
In September, temperatures are generally warmer, with a minimum of 23°C (73°F) and an average reaching 27°C (80°F), peaking at a maximum of 32°C (89°F). The month sees less precipitation, with only 17 mm (0.7 in) falling over approximately 4 days, while humidity remains relatively high at 84%. In contrast, May features slightly cooler temperatures, with a minimum of 19°C (66°F) and an average of 25°C (77°F), though it approaches a maximum of 31°C (88°F). Precipitation is higher in May, totaling 36 mm (1.4 in) over 6 days, accompanied by a similar humidity level of 83%. For more details, you can check Kahului weather in May.
In September, the weather tends to be slightly warmer than in June, with average temperatures reaching 27°C (80°F) compared to June's average of 26°C (79°F). The maximum temperature in September can rise to 32°C (89°F), which is a degree higher than June's maximum of 31°C (88°F). While both months experience high humidity levels of 84%, September sees increased precipitation, averaging 17 mm (0.7 in) over four days, compared to June's 11 mm (0.4 in) over just two days. For more details on June weather, you can check out Kahului weather in June.
In comparing the weather between September and July, we find that both months experience warm temperatures, with September slightly warmer on average. September's minimum temperature is a comfortable 23°C (73°F), peaking at a maximum of 32°C (89°F), while July has a similar minimum of 22°C (73°F) but a slightly lower maximum of 31°C (88°F). Precipitation is more pronounced in July, with 23 mm (0.9 in) compared to September's 17 mm (0.7 in), yet both months see about four days of rain. Humidity levels are comparable, with September at 84% and July at 85%. For more specific insights, you can check out the detailed report for Kahului weather in July.
In comparing the weather of September and August, we observe that both months share similar average temperatures, hovering around 27°C (80°F). However, September experiences slightly higher maximum temperatures, peaking at 32°C (89°F) compared to August's 31°C (89°F). One notable difference is in precipitation; September sees less rainfall with only 17 mm (0.7 in) recorded over 4 days, while August receives 25 mm (1.0 in) over 5 days, making September drier overall. Humidity remains high in both months, with September at 84% and August at 85%. For more details on August weather specifically, you can visit Kahului weather in August.
September tends to be slightly warmer, with average temperatures reaching around 27°C (80°F) and maximums peaking at 32°C (89°F). The humidity remains high at 84%, yet the month experiences relatively low precipitation of just 17 mm over 4 days. In contrast, October sees a slight drop in temperatures, with an average of 26°C (79°F) and max temperatures around 31°C (88°F). However, this month is considerably wetter, receiving 40 mm of precipitation over 7 days, while humidity remains comparable at 83%. For more details on October weather specifics, you can check Kahului weather in October.
In September, the weather is characterized by warmer temperatures, with daily averages around 27°C (80°F) and high humidity at 84%. The month experiences minimal rainfall, with only 17 mm (0.7 in) over about four days. In contrast, November sees slightly cooler temperatures, averaging 25°C (77°F), with a minimum of 19°C (67°F) and maximum reaching 31°C (87°F). However, November has increased precipitation at 25 mm (1.0 in) across approximately seven days, along with a slightly lower humidity of 82%. For more detailed information, check out Kahului weather in November.
In September, the weather features warmer temperatures with a minimum of 23°C (73°F) and an average of 27°C (80°F), reaching a maximum of 32°C (89°F). The month experiences relatively low precipitation, with only 17 mm (0.7 in) over about 4 days and high humidity at 84%. In contrast, December brings cooler temperatures, with a minimum of 18°C (65°F) and an average of 24°C (75°F), peaking at 29°C (85°F). However, it is a wetter month, receiving 45 mm (1.8 in) of rain over 11 days, and slightly lower humidity at 81%. For more details about December weather in Kahului, you can visit Kahului weather in December.
As September unfolds in Kahului, the weather showcases a blend of warmth and occasional rain, setting it apart from other months. With maximum temperatures reaching a pleasant 32°C (89°F) and an average of 27°C (80°F), the days remain inviting, yet the beginnings of humidity at 84% and a slight uptick in precipitation signal the transition toward the wet season. While only 17 mm (0.7 in) of rain may fall over about four days, the air feels more saturated, providing a lush backdrop to the island's natural beauty. For those planning to visit, September offers a unique experience of Kahului's climate as it balances summer's warmth with the hints of autumn's approach. Discover more about what to expect throughout the year in Kahului at Kahului Climate.