September Weather in Lihue, United States

Last updated: February 24, 2025

In September, Lihue, United States, experiences a warm tropical climate with maximum temperatures peaking at 28°C (83°F) and an average of 25°C (78°F). The month is characterized by relatively high humidity levels, averaging around 82%, which can make the heat feel more intense. However, it is also a season of frequent rain, with precipitation totaling 65 mm (2.5 in) over 21 days. This combination of warmth and moisture creates an inviting yet lush environment, typical of Hawaii's enchanting weather patterns.

September Temperature in Lihue

In September, Lihue embraces a warm tropical climate, with temperatures gradually rising as summer winds down. This month boasts a minimum temperature of 23°C (73°F), aligning with the previous months, while the average temperature remains steady at 25°C (78°F), reflecting a slight continuation of the warmth experienced in the height of summer. As the days linger around a maximum of 28°C (83°F), this peak is characteristic of late summer's residual heat, marking a smooth transition into the cooler autumn months. Overall, September offers a delightful balance of warmth without the intensity of peak summer, making it an inviting time to enjoy the beautiful island scenery.

September Weather in Lihue: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lihue, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec727171737476777878777573
Data source: Temperature data for Lihue generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Lihue

In September, Lihue experiences a moderate precipitation total of 65 mm (2.5 in) over approximately 21 days of rainfall, marking a slight decrease from the wetter summer months. As the transition to autumn begins, this month typically sees a reduction in overall precipitation compared to the heaviest rainfall in March at 156 mm (6.1 in) and a gradual shift from the warm, humid conditions of August. Despite fewer rainy days compared to the peak of summer, September's rainfall still contributes to the lush landscape of Kauai, ensuring that the region remains vibrant and green as it prepares for the wetter months ahead.

September Precipitation Trends in Lihue

The chart displays monthly precipitation patterns in Lihue, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec60941568063928080659576127
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lihue

In September, Lihue, United States, experiences a humidity level of 82%, which reflects a slight dip from the peak summer months of July and August, each boasting 83%. This seasonal trend highlights the region's overall high humidity, characterized by consistent measurements throughout the year, ranging from a low of 78% in January and March to a high of 83% in the summer. As the island transitions into fall, humidity remains relatively stable, indicating a persistent tropical climate that influences both the air and surrounding landscapes. With October bringing a marginal decrease to 81%, the humid conditions are likely to enhance the lushness of the vibrant Hawaiian flora that defines this picturesque locale.

September Average Humidity in Lihue

This chart illustrates the average monthly humidity levels in Lihue, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%78%81%82%82%83%83%82%81%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lihue

September in Lihue continues the trend of intense sun exposure, with a UV Index of 12, classified as extreme. This level of UV radiation means that even short periods outdoors can lead to skin damage, with a burn time of just 10 minutes. Notably, this month’s UV levels are slightly lower than the peak seen in July and August, both registering a UV Index of 13. As the summer winds down, the UV Index remains a critical factor for sun safety in Lihue, emphasizing the importance of protection against harmful rays. To learn more about the UV trends year-round, check out the detailed guide on the Lihue UV Index.

Maximum UV Index Levels in Lihue for September

The chart shows the monthly maximum UV Index (UVI) for Lihue in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec710111113121313121087
Data source: Lihue September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Lihue

September in Lihue is a delightful continuation of the sunny season, boasting 315 hours of sunshine that perfectly transitions summer into fall. After a peak in July with 349 hours, the sunshine begins to gently wane, yet September still offers a generous amount of bright days. Notably, this month’s hours are only slightly less than those in August's 337 hours, indicating a robust and radiant early autumn. As the year progresses, the trend reveals a gradual decline in sunlight, with October seeing 298 hours ahead of the cooler months. Still, September stands out for its lingering warmth and golden rays, inviting both locals and visitors to bask in the beauty of Lihue's vibrant landscapes.

Monthly Sunshine Duration in Lihue: September Highlighted

The September sunshine duration represents the total number of hours Lihue experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec216h256h283h305h335h334h349h337h315h298h268h256h
Data source: Lihue September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Lihue During September

As September rolls in, Lihue experiences a 54% chance of sunny weather, maintaining a pleasant trend that peaks during the late summer months. After a notably bright August, which boasts a 61% chance of sunshine, the likelihood of clear skies dips slightly but remains favorable. The sunny disposition of June and July, with probabilities of 60% and 46% respectively, hints at the overall trend of a warm and inviting September. This month sits comfortably within the stable range of sunshine as summer transitions to fall, making it an ideal time for outdoor activities in this picturesque coastal town.

Percentage of Sunny Days in September in Lihue

The chart illustrates the percentage of sunny days in Lihue throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Lihue experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec52%52%43%50%56%60%46%61%54%56%56%33%
Data source: Lihue September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Lihue in September

In September, Lihue enjoys about 12 hours of daylight, matching the duration seen in both April and August. This month represents a transitional phase as daylight subtly begins to wane after the sunniest months of summer, which boast a peak of 13 hours in May, June, and July. As the year progresses, daylight gradually decreases, tapering to 11 hours in October and settling at 10 hours by December. The trend highlights a rhythmic ebb and flow of sunlight throughout the year, inviting residents and visitors to relish the last warm rays before the shorter days of autumn settle in.

Average Daylight Hours in Lihue for September

The chart illustrates the variation in daylight duration in Lihue throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 56m11h 25m12h 2m12h 40m13h 11m13h 26m13h 18m12h 50m12h 13m11h 36m11h 3m10h 48m
Data source: Lihue daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Lihue

September in Lihue brings with it a gentle average wind speed of 5.5 m/s (12 mph), consistent with the preceding month and mirroring the typical gusts observed in both January and October. This stability signifies a smooth transition into the fall, as winds are typically calmer during the summer months, showing a slight dip from July's peak of 6.0 m/s (14 mph). As the year progresses, October retains this same brisk pace, hinting at a seasonal consistency. Overall, September's winds embody a pleasant balance, making it an ideal time for outdoor activities while enjoying the mild coastal climate.

Average September Wind Speed in Lihue

The chart displays monthly wind speed patterns in Lihue, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.55.16.14.84.84.66.05.35.5 m/s5.53.96.1
Data source: Lihue September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Lihue Compares to Other Months

The weather in Lihue 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 Lihue and find detailed weather information for every month.

In September, the weather is generally warmer with average temperatures around 25°C (78°F) and maximums reaching up to 28°C (83°F). This month tends to be quite humid, with an average humidity of 82% and regular rainfall, as evidenced by the 65 mm (2.5 in) of precipitation over 21 days. In contrast, January offers a slightly cooler climate, with average temperatures lowering to 22°C (73°F) and maximums peaking at 25°C (78°F). Additionally, January experiences less rainfall, totaling 60 mm (2.3 in) over just 11 days, and a slight decrease in humidity to 78%. For more details about January weather in Lihue, you can visit Lihue weather in January.

September and February exhibit distinct weather patterns, showcasing the transition between late summer and early spring. September boasts warmer temperatures, with a minimum of 23°C (73°F) and an average of 25°C (78°F), while February experiences cooler conditions, starting with a minimum of 16°C (62°F) and an average of 22°C (71°F). Precipitation is more prominent in February with 94 mm (3.7 in) over 17 days compared to September's 65 mm (2.5 in) across 21 days. Despite the higher precipitation, February maintains a slightly lower humidity at 79% compared to September's 82%. For more detailed insights, you can explore Lihue weather in February.

In comparing the weather between September and March, September generally presents warmer temperatures with average highs of 28°C (83°F) compared to March's average maximum of 25°C (78°F). While September enjoys a milder humidity level of 82% and less precipitation at 65 mm (2.5 in), March experiences a notable increase in rainfall, with a total of 156 mm (6.1 in) over the same number of days. Despite the cooler temperatures in March, the humidity remains relatively high at 78%, creating a different feel to the month. For a more detailed look at conditions during this time, check out Lihue weather in March.

When comparing the weather in September and April, we find that September tends to be slightly warmer, with average temperatures reaching around 25°C (78°F), while April has a cooler average of 23°C (73°F). Precipitation levels are quite similar, with September receiving 65 mm (2.5 in) over 21 days and April experiencing slightly higher precipitation at 80 mm (3.2 in) across 20 days. Both months exhibit high humidity, but September leads with 82%, compared to April's 81%. For more detailed information on April's weather, check out Lihue weather in April.

September and May share similar temperature ranges, with September experiencing slightly warmer averages, with a minimum of 23°C (73°F) and an average of 25°C (78°F), compared to May's minimum of 19°C (67°F) and average of 23°C (74°F). Both months feature approximately the same amount of precipitation, at 65 mm (2.5 in) for September and 63 mm (2.5 in) for May, spread across 21 rainy days. Humidity is consistent in both months at 82%, creating a similar tropical feel. For more detailed insights about weather conditions in May, you can visit Lihue weather in May.

When comparing the weather in September and June, both months exhibit warm temperatures, but there's a slight variation in their averages. September tends to be warmer with minimum temperatures of 23°C (73°F) and maximum temperatures reaching 28°C (83°F), while June has a slightly cooler range with minimums at 21°C (71°F) and maximums of 27°C (81°F). Precipitation levels in June are higher at 92 mm (3.6 in), occurring over 20 days, compared to September's 65 mm (2.5 in) spread over 21 days. Despite similar humidity levels at 82%, June generally experiences more rainfall than September. For more detailed insights, you can check Lihue weather in June.

When comparing the weather in September to that of July, both months exhibit similar temperature ranges, with September having a minimum temperature of 23°C (73°F) and a maximum of 28°C (83°F), slightly edging out July's temperatures, which range from 22°C (73°F) to 28°C (82°F). However, September experiences slightly less precipitation, totaling 65 mm (2.5 in) over 21 days, compared to July's 80 mm (3.2 in) across 26 days. Humidity levels remain comparable, with September at 82% and July slightly higher at 83%. For more specific details on July weather, you can visit Lihue weather in July.

In comparing the weather of September and August, we find that both months share similar temperature ranges, with September having a minimum temperature of 23°C (73°F) and an average of 25°C (78°F), the same as August. However, September experiences slightly less precipitation, with 65 mm (2.5 in) over 21 days compared to August's 80 mm (3.2 in) over 23 days. Humidity levels are also comparable, with September at 82% and August slightly higher at 83%. For more detailed insights, you can check out Lihue weather in August.

September and October exhibit similar temperature patterns, with September having slightly warmer minimum and maximum temperatures compared to October. September’s average temperature stands at 25°C (78°F), while October maintains the same average but a marginally lower minimum of 22°C (71°F). Precipitation increases in October, with 95 mm (3.7 in) falling over 22 days, compared to 65 mm (2.5 in) over 21 days in September. Humidity remains relatively stable, only slightly decreasing from 82% in September to 81% in October. For a more detailed look at October’s weather specifics, you can visit this link: Lihue weather in October.

In September, the weather tends to be warm with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 28°C (83°F), accompanied by high humidity at 82%. The month experiences about 65 mm (2.5 in) of precipitation over 21 days. In contrast, November sees slightly cooler temperatures with a minimum of 21°C (69°F) and a maximum of 27°C (81°F), while maintaining a similar level of rainfall at 76 mm (3.0 in) over the same number of days. Despite the drop in temperature, November's humidity remains relatively low at 80%. For a more detailed look at the weather during this time, check out Lihue weather in November.

In comparing the weather between September and December, we see a slight decrease in temperatures, with September enjoying an average of 25°C (78°F) compared to December's 23°C (74°F). Both months experience similar rainfall patterns, with September recording 65 mm (2.5 in) and December reaching 127 mm (5.0 in), despite both having 21 days of precipitation. Interestingly, humidity remains relatively high in both months, at 82% in September and 79% in December. For more specific details on December's weather in Lihue, you can check out Lihue weather in December.

Compare Lihue's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Lihue

September in Lihue presents a unique blend of warm temperatures and increased humidity, distinguishing it from the drier summer months. With a pleasant average temperature hovering around 25°C (78°F), visitors can still enjoy outdoor activities, though they should be prepared for the frequent rain, as approximately 21 days of the month see precipitation. The lush landscape, invigorated by 65 mm of rainfall, creates a vibrant setting perfect for exploring nature. As humidity peaks at 82%, the air feels warmer, adding a tropical essence to your stay. For a more comprehensive understanding of what to expect weather-wise, delve deeper into Lihue Climate for detailed insights.