Waimea, Big Island weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Waimea, Big Island in September. Check more long-term weather averages for Waimea, Big Island in September before you book your next holiday to Hawaii in 2025/2026.

  • 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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Waimea, Big Island by month

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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 26°C in Waimea, Big Island in September with low heat and humidity, falling to 17°C at night.

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

There are normally 7 hours of bright sunshine each day in Waimea, Big Island in September - that's 53% of daylight hours.

Does it rain in Waimea, Big Island in September?

There are usually 18 days with some rain in Waimea, Big Island in September and the average monthly rainfall is 25mm.

Waimea, Big Island September sunrise & sunset times

Browse the sunrise and sunset times for Waimea, Big Island in September 2025. Select a month to view Waimea, Big Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:07 18:37
Monday, 15th September 2025 06:10 18:25
Tuesday, 30th September 2025 06:13 18:11

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