Waimea, Big Island weather in September 2026

Expect daytime maximum temperatures of 26°C in Waimea, Big Island, Hawaii in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 18 days with some rainfall.

  • 26°C maximum daytime temperature in September in Waimea, Big Island26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in September in Waimea, Big Island18
    18 days with some rainfall
  • 17°C minimum night-time temperature in September in Waimea, Big Island17
    17°C min night temperature
  • 12 hours of daylight per day in September in Waimea, Big Island12
    12 hours of daylight per day
  • Low heat & humidity in September in Waimea, Big IslandL
    Low heat & humidity
  • 25 mm monthly rainfall in September in Waimea, Big Island25
    25 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Waimea, Big Island11
    11 (Extreme) UV index

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The September weather guide for Hawaii (Waimea, Big Island) 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 Waimea, Big Island in September?

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

How sunny is it in Waimea, Big Island in September?

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

How warm is the sea around Waimea, Big Island in September?

The average sea temperature around Waimea, Big Island in September is 27°C.

Does it rain in Waimea, Big Island in September?

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

Waimea, Big Island September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:07 18:38
Tuesday, 15th September 2026 06:10 18:25
Wednesday, 30th September 2026 06:13 18:11

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