Lihue, Kauai weather in September 2026

Expect daytime maximum temperatures of 29°C in Lihue, Kauai, Hawaii in September and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 54 mm of rainfall in the month.

  • 29°C maximum daytime temperature in September in Lihue, Kauai29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in September in Lihue, Kauai16
    16 days with some rainfall
  • 23°C minimum night-time temperature in September in Lihue, Kauai23
    23°C min night temperature
  • 12 hours of daylight per day in September in Lihue, Kauai12
    12 hours of daylight per day
  • High heat & humidity in September in Lihue, KauaiH
    High heat & humidity
  • 54 mm monthly rainfall in September in Lihue, Kauai54
    54 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Lihue, Kauai11
    11 (Extreme) UV index
  • 27°C sea temperature in September in Lihue, Kauai27
    27°C sea temperature

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Lihue, Kauai by month

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The September weather guide for Hawaii (Lihue, Kauai) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Lihue, Kauai in September?

Daytime temperatures usually reach 30°C in Lihue, Kauai in September with high heat and humidity, falling to 22°C at night.

How sunny is it in Lihue, Kauai in September?

There are normally 9 hours of bright sunshine each day in Lihue, Kauai in September - that's 74% of daylight hours.

How warm is the sea around Lihue, Kauai in September?

The average sea temperature around Lihue, Kauai in September is 27°C.

Does it rain in Lihue, Kauai in September?

There are usually 8 days with some rain in Lihue, Kauai in September and the average monthly rainfall is 18mm.

Lihue, Kauai September sunrise & sunset times

Browse the sunrise and sunset times for Lihue, Kauai in September 2026. Select a month to view Lihue, Kauai sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:21 18:54
Tuesday, 15th September 2026 06:24 18:40
Wednesday, 30th September 2026 06:29 18:26

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